CN104141667A - Thread connection elastic sleeve and thread connection structure - Google Patents
Thread connection elastic sleeve and thread connection structure Download PDFInfo
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- CN104141667A CN104141667A CN201310165680.8A CN201310165680A CN104141667A CN 104141667 A CN104141667 A CN 104141667A CN 201310165680 A CN201310165680 A CN 201310165680A CN 104141667 A CN104141667 A CN 104141667A
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- threaded
- elastic sleeve
- piece
- hole
- connection structure
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Abstract
The invention provides a thread connection elastic sleeve and a thread connection structure. The thread connection elastic sleeve comprises a cylindrical sleeve body with the variable outer diameters. The outer diameter of the middle of the sleeve body is smaller than the outer diameters of the two ends of the sleeve body, the variable diameters are in arc-surface transition, a smooth through hole matched with a thread segment of a thread piece is formed in the sleeve body, and a spherical surface is arranged at one end of the thread connection elastic sleeve. The thread connection elastic sleeve is simple and reasonable in structure and overcomes multiple defects in the prior art. The thread connection elastic sleeve is used in cooperation with a bolt, pretightening force between the thread piece and a connected piece can be effectively maintained, and thread connection reliability can be ensured.
Description
Technical field
The present invention relates to the technology of being threaded, relate in particular to a kind of elastic sleeve and screw connection structure of being threaded.
Background technique
Raising day by day along with railway track traffic electric locomotive motion speed, electric locomotive technology development, the significance of threaded fastener in locomotive design, manufacture and assembly process will constantly be strengthened, and electric locomotive working environment connects double thread to propose higher requirement.
Conventionally being threaded is with threaded fastener, two or more connected pieces to be clamped together, so that the various outer cultivation lotuses of its opposing make the not separated and not slippage of connected piece, or connected piece mating face is not revealed.
Pretension can improve bolted reliability, strengthens the tightness and the rigidity that connect.The reliability that higher pretightening force double thread connects and the life-span of connected piece are all useful.When the plain bolt connection of lateral load is born in employing, pretightening force deficiency will cause connected piece slippage, thereby cause connected piece dislocation, crooked, wrinkle, and even fastening piece (threaded piece) is cut off; When the bolt connection of thrust load is born in employing, pretightening force deficiency will cause mating face to be revealed, and even two links are separated.In addition, pretightening force deficiency also will cause strong transverse vibration, causes nut to get loose.
Pretightening force reduces to make load luffing to increase, and bolt fatigue life is declined.As acted on long-time, stronger axial vibration on bolt, will make pretightening force decline 30%～40%, but conventionally can total loss pretightening force not cause fastening piece to come off.For a long time, strong transverse vibration will make pretightening force all disappear, fastening piece comes off.So, how to guarantee that bolt pretightening is a difficult problem urgently to be resolved hurrily.
Summary of the invention
The object of the invention is to, for above-mentioned thread spindle to or the transverse vibration problem that easily causes pretightening force to decline, a kind of elastic sleeve that is threaded is proposed, be used in conjunction with bolt, can effectively maintain the pretightening force between threaded piece and connected piece, guarantee the reliability being threaded.
For achieving the above object, the technical solution used in the present invention is: a kind of elastic sleeve that is threaded, comprise that external diameter is the cylindrical body of reducing, the external diameter at this body middle part is less than the external diameter at these body two ends, between described reducing by arc surface transition, this body inside is the smooth through hole coordinating with threaded piece thread section, and one end that described bolt connects elastic sleeve is sphere.
Further, described through-hole aperture is D2, the external diameter at described body middle part is D1, the external diameter at described body two ends is D3, the radius of described arc surface is R, the radius of described sphere is SR, the size of the described elastic sleeve that is threaded should meet following requirement: D1-D2=5 ± 0.5mm, D3-D1=9 ± 0.5mm, D3-D2=14 ± 0.5mm, described bolt connects the overall length 2 * D3mm of elastic sleeve, R=10 ± 0.5mm, SR=85 ± 0.5mm, described body is 8 ± 0.5mm near the height of the large footpath section of sphere, described body is 5 ± 0.5mm away from the height of the large footpath section of sphere.
Further, described bolt connects elastic sleeve employing 60Si
2mnA is prepared from.
Further, the hardness that described bolt connects elastic sleeve is 45～50HRC, and through turning blue processing.
The present invention also comprises a kind of screw connection structure, comprise threaded piece, described in be threaded elastic sleeve and connected piece, described connected piece is provided with the tapped hole coordinating with threaded piece, and described threaded piece one end passes after the through hole of the elastic sleeve that is threaded and connected piece tapped hole screw-thread fit.
Further, described connected piece upper screwed hole near state one end of the elastic sleeve that is threaded coaxial be provided with the hole that internal diameter is D3+5mm, described in the elastic sleeve sphere that is threaded be embedded in this hole.
Further, described threaded piece includes but not limited to bolt or stud.
Further, when described threaded piece is 8.8 grades of carbon steel bolts, according to pretightening force F
0carry out threaded together, described pretightening force F
0=(0.65～0.68) σ
sa
s, σ wherein
sfor the yield limit of bolt material, unit is MPa; A
sfor screw thread nominal stress sectional area, unit is mm
2.
Further, when described threaded piece is 10.9 grades of carbon steel bolts, according to pretightening force 1.4 * F
0carry out threaded together.
Be threaded elastic sleeve and screw connection structure of the present invention is simple, rationally, has the following advantages compared with prior art: this elastic sleeve that is threaded adopts the material 60Si2MnA with superior elasticity deformation to be prepared from; This elastic sleeve that is threaded is that external diameter is the cylindrical body of reducing, has further improved its elastic strain ability.Adopt the screw connection structure of this elastic sleeve that is threaded, connect reliably the long service life of threaded piece.In addition, the present invention be threaded elastic sleeve and screw connection structure cost low, easy to process, be suitable for producing in enormous quantities.
Accompanying drawing explanation
Fig. 1 is the be threaded structural representation of elastic sleeve of the present invention;
Fig. 2 is the structural representation of embodiment's 2 screw connection structures;
Fig. 3 is the structural representation of embodiment's 3 screw connection structures.
Embodiment
Embodiment 1
Fig. 1 is the be threaded structural representation of elastic sleeve of the present invention.
The present embodiment discloses a kind of elastic sleeve that is threaded with stress compensation effect, as shown in Figure 1, this elastic sleeve that is threaded is that external diameter is the cylindrical body of reducing, the external diameter at this body middle part is less than the external diameter at these body two ends, and the variable diameter design elastic sleeve that can make to be threaded has good elasticity.Between this reducing, by arc surface transition, the middle part of this body and two ends reducing go out for arc surface transition, and this body inside is the smooth through hole coordinating with threaded piece thread section, and one end that this bolt connects elastic sleeve is sphere.
In order to guarantee the best mechanical property of this elastic sleeve that is threaded, the optimum size of having determined this elastic sleeve that is threaded is as follows: through-hole aperture is D2, the external diameter at described body middle part is D1, the external diameter at described body two ends is D3, be that body two ends external diameter equates, the radius of described arc surface is R, the radius of described sphere is SR, the size of the described elastic sleeve that is threaded should meet following requirement: D1-D2=5mm, D3-D1=9mm, D3-D2=14mm, described bolt connects the overall length 2 * D3mm of elastic sleeve, R=10mm, SR=85mm, described body is 8mm near the height of the large footpath section of sphere, described body is 5mm away from the height of the large footpath section of sphere.
In order further to increase the elasticity of this elastic sleeve that is threaded, in the present embodiment, bolt connection elastic sleeve adopts 60Si2MnA to be prepared from.The hardness that this bolt connects elastic sleeve is that 45～50HRC(adopts heat treatment), and through turning blue processing.
Described in the present embodiment, bolt connection elastic sleeve and bolt are used in conjunction with, and can effectively maintain the pretightening force between threaded piece and connected piece, guarantee the reliability being threaded.And this bolt connection elastic sleeve structure is simple, and cost is low, and course of working is simple and direct, is suitable for producing in enormous quantities.
Embodiment 2
Fig. 2 is the structural representation of embodiment's 2 screw connection structures.
The present embodiment discloses a kind of screw connection structure, as shown in Figure 2, this screw connection structure comprises bolt 1, disclosed elastic sleeve 2 and the connected piece 3 of being threaded of embodiment 1, this connected piece 3 is provided with the tapped hole coordinating with bolt 1, and described bolt 1 one end passes after the through hole of the elastic sleeve 2 that is threaded and connected piece 3 tapped hole screw-thread fit.
These connected piece 3 upper screwed holes near state one end of the elastic sleeve 2 that is threaded coaxial be provided with the hole that internal diameter is D3+5mm, one end that this elastic sleeve that is threaded is provided with sphere is embedded in this hole, in the process of installing at bolt 1, this elastic sleeve that is threaded can swing by this sphere by a small margin, effectively reduces the generation of threaded piece bending situation.
In the present embodiment, bolt 1 is 8.8 grades of carbon steel bolts, according to pretightening force F
0carry out threaded together, described pretightening force F
0=(0.65～0.68) σ
sa
s, σ
sfor the yield limit of bolt material, unit is MPa; As is screw thread nominal stress sectional area, and unit is mm
2.
The present embodiment is disclosed to be had stress compensation effect and has the elastic sleeve of being threaded and adopt 60Si
2mnA material and specific structure and size, and the threaded piece pretightening force that the elastic sleeve that is threaded with this is used in conjunction with is carried out requirement.Elastic sleeve is threaded described in employing the present embodiment, under alternate load, vibration and percussion, can effectively maintain the pretightening force between threaded piece and connected piece in the devices such as pull-rod device, motor hanging device, traction gear and the braking device installed on bogie, it is reliable that assurance is threaded, and make threaded piece be difficult for producing too early fatigue ruption, avoid causing locomotive serious accident to occur.
Embodiment 3
Fig. 3 is the structural representation of embodiment's 3 screw connection structures.
The present embodiment discloses a kind of screw connection structure, as shown in Figure 3, this screw connection structure comprises nut 4, stud 5, the elastic sleeve that is threaded 2 and connected piece 3, this connected piece is provided with the tapped hole coordinating with threaded piece, one end of this stud 5 passes after the through hole of the elastic sleeve 2 that is threaded and connected piece 3 tapped hole screw-thread fit, 5 the other ends of stud and nut 4 screw-thread fit.
These connected piece 3 upper screwed holes near state one end of the elastic sleeve 2 that is threaded coaxial be provided with the hole that internal diameter is D3+5mm, described in the one end that elastic sleeve 2 is provided with sphere that is threaded be embedded in this hole.
The disclosed screw connection structure of the present embodiment can maintain the pretightening force between threaded piece and connected piece equally, realizes the reliability that threaded piece connects, and then the working life of effectively improving threaded piece.
The present invention is not limited to be threaded elastic sleeve and the screw connection structure that above-described embodiment is recorded, this be threaded the change of elastic sleeve material, the change of the change of size, pretightening force size all within protection scope of the present invention.
Finally it should be noted that: each embodiment, only in order to technological scheme of the present invention to be described, is not intended to limit above; Although the present invention is had been described in detail with reference to aforementioned each embodiment, those of ordinary skill in the art is to be understood that: its technological scheme that still can record aforementioned each embodiment is modified, or some or all of technical characteristics is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technological scheme.
Claims (9)
1. the elastic sleeve that is threaded, it is characterized in that, comprise that external diameter is the cylindrical body of reducing, the external diameter at this body middle part is less than the external diameter at these body two ends, between described reducing by arc surface transition, this body inside is the smooth through hole coordinating with threaded piece thread section, and one end that described bolt connects elastic sleeve is sphere.
2. elastic sleeve is according to claim 1 threaded, it is characterized in that, described through-hole aperture is D2, the external diameter at described body middle part is D1, the external diameter at described body two ends is D3, the radius of described arc surface is R, the radius of described sphere is SR, the size of the described elastic sleeve that is threaded should meet following requirement: D1-D2=5 ± 0.5mm, D3-D1=9 ± 0.5mm, D3-D2=14 ± 0.5mm, described bolt connects the overall length 2 * D3mm of elastic sleeve, R=10 ± 0.5mm, SR=85 ± 0.5mm, described body is 8 ± 0.5mm near the height of the large footpath section of sphere, described body is highly 5 ± 0.5mm away from the large footpath section of sphere.
3. the elastic sleeve that is threaded according to claim 1, is characterized in that, described bolt connects elastic sleeve and adopts 60Si
2mnA is prepared from.
4. the elastic sleeve that is threaded according to claim 1, is characterized in that, the hardness that described bolt connects elastic sleeve is 45～50HRC, and through turning blue processing.
5. a screw connection structure, it is characterized in that, comprise be threaded described in threaded piece, claim 1-4 any one elastic sleeve and connected piece, described connected piece is provided with the tapped hole coordinating with threaded piece, and described threaded piece one end passes after the through hole of the elastic sleeve that is threaded and connected piece tapped hole screw-thread fit.
6. screw connection structure according to claim 5, is characterized in that, described connected piece upper screwed hole near one end of stating the elastic sleeve that is threaded coaxial be provided with the hole that internal diameter is D3+5mm, described in the elastic sleeve sphere that is threaded be embedded in this hole.
7. screw connection structure according to claim 5, is characterized in that, described threaded piece is bolt or stud.
8. screw connection structure according to claim 5, is characterized in that, when described threaded piece is 8.8 grades of carbon steel bolts, according to pretightening force F
0carry out threaded together, described pretightening force F
0=(0.65～0.68) σ
sa
s, σ wherein
syield limit for bolt material; A
sfor screw thread nominal stress sectional area.
9. screw connection structure according to claim 8, is characterized in that, when described threaded piece is 10.9 grades of carbon steel bolts, according to pretightening force 1.4 * F
0carry out threaded together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310165680.8A CN104141667B (en) | 2013-05-07 | 2013-05-07 | Threaded resilient sleeve and screw connection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310165680.8A CN104141667B (en) | 2013-05-07 | 2013-05-07 | Threaded resilient sleeve and screw connection structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104141667A true CN104141667A (en) | 2014-11-12 |
| CN104141667B CN104141667B (en) | 2016-06-15 |
Family
ID=51850946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310165680.8A Active CN104141667B (en) | 2013-05-07 | 2013-05-07 | Threaded resilient sleeve and screw connection structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104141667B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108550690A (en) * | 2018-05-17 | 2018-09-18 | 南京溧水得瑞微型电机厂 | A kind of strip piezoelectric transformer radiator preload power apparatus |
| CN110107778A (en) * | 2019-05-31 | 2019-08-09 | 钟明 | A kind of ground pin device and its application method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0067941B1 (en) * | 1981-06-24 | 1986-12-30 | Fischerwerke Arthur Fischer GmbH & Co. KG | Expansive bolt for anchoring in bore-holes with conical internal enlargement |
| JPS624926A (en) * | 1985-06-28 | 1987-01-10 | Toshiba Corp | Shaft joint of rotary machine |
| DE3801735A1 (en) * | 1988-01-21 | 1989-07-27 | Mantel Juval | Washers which are insulated with respect to structure-borne sound |
| CN201651000U (en) * | 2010-03-18 | 2010-11-24 | 上海大众汽车有限公司 | Connecting sleeve |
| CN201802733U (en) * | 2010-10-11 | 2011-04-20 | 郑永国 | Screw component |
| CN202402435U (en) * | 2011-12-27 | 2012-08-29 | 佳木斯电机股份有限公司 | Bolt-nut structure for high-temperature high-pressure shielding electric pump |
-
2013
- 2013-05-07 CN CN201310165680.8A patent/CN104141667B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0067941B1 (en) * | 1981-06-24 | 1986-12-30 | Fischerwerke Arthur Fischer GmbH & Co. KG | Expansive bolt for anchoring in bore-holes with conical internal enlargement |
| JPS624926A (en) * | 1985-06-28 | 1987-01-10 | Toshiba Corp | Shaft joint of rotary machine |
| DE3801735A1 (en) * | 1988-01-21 | 1989-07-27 | Mantel Juval | Washers which are insulated with respect to structure-borne sound |
| CN201651000U (en) * | 2010-03-18 | 2010-11-24 | 上海大众汽车有限公司 | Connecting sleeve |
| CN201802733U (en) * | 2010-10-11 | 2011-04-20 | 郑永国 | Screw component |
| CN202402435U (en) * | 2011-12-27 | 2012-08-29 | 佳木斯电机股份有限公司 | Bolt-nut structure for high-temperature high-pressure shielding electric pump |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108550690A (en) * | 2018-05-17 | 2018-09-18 | 南京溧水得瑞微型电机厂 | A kind of strip piezoelectric transformer radiator preload power apparatus |
| CN110107778A (en) * | 2019-05-31 | 2019-08-09 | 钟明 | A kind of ground pin device and its application method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104141667B (en) | 2016-06-15 |
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| C10 | Entry into substantive examination | ||
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| CB02 | Change of applicant information |
Address after: 037038 Shanxi City, Datong City Qianjin Street, No. 1 Applicant after: CNR DATONG ELECTRIC LOCOMOTIVE CO., LTD. Address before: 037038 Daqing Road, Shanxi, No. 1, No. Applicant before: CNR, Datong Electric Locomotive Co., Ltd. |
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| GR01 | Patent grant |