CN203051486U - Support bearing - Google Patents
Support bearing Download PDFInfo
- Publication number
- CN203051486U CN203051486U CN 201220729041 CN201220729041U CN203051486U CN 203051486 U CN203051486 U CN 203051486U CN 201220729041 CN201220729041 CN 201220729041 CN 201220729041 U CN201220729041 U CN 201220729041U CN 203051486 U CN203051486 U CN 203051486U
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- CN
- China
- Prior art keywords
- joint
- elastomer
- spring bearing
- metal spacer
- support bearing
- 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.)
- Expired - Lifetime
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Abstract
The utility model belongs to the technique of helicopter component design, relates to the improvement of a support bearing used for a helicopter propeller hub, and in particular relates to a support bearing. The support bearing comprises a small joint, a large joint and an elastomer, wherein the elastomer is concave and is composed of a plurality of metal spacers and rubber layers, which are staggered in turn; the thickness L1 of the end, near the large joint, of the elastomer is less than the thickness L2 of the end, near the small joint, of the elastomer and the elastomer is wedge-shaped. According to the utility model, the lumbar part of a circular platform composed of metal spacers and rubber layers is concave, and the stress generated by the rubber layers of the support bearing which cuts the lumbar part into an A-A cutaway view shape is small, so that the service life of the support bearing is greatly improved.
Description
Technical field
The utility model belongs to the helicopter component designing technique, relates to the improvement to the spring bearing that is used for helicopter hub, particularly relates to a kind of spring bearing.
Background technique
At present, be used for the structure of spring bearing of helicopter hub referring to Fig. 1, it is connected little joint 1 by little joint 1, big joint 2, a plurality of metal spacer that stacks with one heart 3 and forms with metal spacer 3, adjacent two metal spacers 3 and metal spacer 3 and the rubber layer 4 of big joint 2 with sulfuration, all between little joint 1 and big joint 2, the thickness of all metal spacers 3 is identical for all metal spacers 4.Its shortcoming is: because the round platform waist that metal spacer [3] and rubber layer [4] are formed does not have concave shape, so spring bearing can produce bigger flexural stress on X ' axle direction, spring bearing is not cut into A-A sectional view shape along Y ' axle simultaneously, so produce bigger shearing stress at X ' axle direction, thereby two kinds of stress all make rubber layer 4 crack easily, thereby shorten the life-span of spring bearing greatly.
The model utility content
The purpose of this utility model is: propose a kind of spring bearing, reduce the stress of spring bearing rubber, to carry the working life of bearing.
The technical solution of the utility model is: a kind of spring bearing, comprise little joint, big joint and elastomer, described elastomer is inner concavity, formed by some metal spacer and rubber layers that interlock successively, the thickness L1 of close big joint one end of described elastomer is wedge shape less than the thickness L2 near little joint one end.The thickness of described metal spacer is identical.The upper-end surface of little joint is protruding spherical crown surface, and the lower end surface of big joint is recessed spherical crown surface, and all metal spacers all are the spherical crown surfaces.The external diameter minimum of the metal spacer of the little joint of adjacency, the external diameter maximum of the metal spacer of the big joint of adjacency, the external diameter of middle metal spacer reduces from the top down gradually.The centre of sphere on each spherical crown surface is arranged vertically successively from top to bottom.
The beneficial effects of the utility model are: the waist of the round platform that the utility model metal spacer and rubber layer are formed is that the stress that produces of the rubber layer of concave shape and the spring bearing that is cut into A-A sectional view shape along Y-axis is less, thus the working life of having improved spring bearing greatly.Evidence, be more than doubled than existing spring bearing the working life of spring bearing of the present utility model, and cost reduces half, and a year economic loss reduces by 1,300,000 RMB.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of existing spring bearing for helicopter hub.
Fig. 3 is plan view of the present utility model.
Fig. 4 is A-A sectional view of the present utility model.
Fig. 5 is the plan view of existing spring bearing for helicopter hub.
Fig. 6 is the B-B sectional view of existing spring bearing for helicopter hub.
Fig. 7 is structure exploded perspective view of the present utility model.
Wherein, the little joint of 1-, the big joint of 2-, 3-metal spacer, 4-rubber layer, 5-elastomer.
Embodiment
Below the utility model is described in further details.Referring to Fig. 1,2,3,4,5,6,7, a kind of spring bearing, comprise little joint 1, big joint 2 and elastomer 5, described elastomer 5 is inner concavity, formed by some metal spacer 3 and rubber layers 4 that interlock successively, the thickness L1 of described elastomer 5 close big joint 2 one ends is wedge shape less than the thickness L2 near little joint one end.
The thickness of described metal spacer 3 is identical.
The upper-end surface of little joint 1 is protruding spherical crown surface, and the lower end surface of big joint 2 is recessed spherical crown surface, and all metal spacers 3 all are the spherical crown surfaces.
The external diameter minimum of the metal spacer 3 of the little joint 1 of adjacency, the external diameter maximum of the metal spacer 3 of the big joint 2 of adjacency, the external diameter of middle metal spacer 3 reduces from the top down gradually.
The centre of sphere on each spherical crown surface is arranged vertically successively from top to bottom, when between little joint 1 and big joint 2, applying certain pressure, behind all rubber layer 4 pressurizeds, the centre of sphere on each spherical crown surface all overlaps the centre of sphere O place on the spherical crown surface of little joint 1 upper-end surface, guarantee all rubber extruded amount of deformation unanimities of each rubber layer 4, it is basic identical to reach the pressure stress that the rubber at rubber layer 4 each positions is subjected to.
Working principle of the present utility model is: when applying certain active force in opposite directions along X-axis between little joint 1 and big joint 2, the rubber layer 4 that is cut into the spring bearing of A-A sectional view shape along Y-axis can produce less shearing stress in X-axis direction, when at big joint 2 when X-axis applies certain bending moment, the rubber layer 4 that metal spacer 3 and rubber layer 4 are formed the spring bearing of round platform waist concave shape can produce less flexural stress on X-axis direction, reach and prevent that rubber layer 4 from cracking, thus the life-span of having improved spring bearing.
Claims (5)
1. spring bearing, comprise little joint [1], big joint [2] and elastomer [5], described elastomer [5] is inner concavity, formed by some metal spacer [3] and rubber layers [4] that interlock successively, it is characterized in that, the thickness L1 of close big joint [2] one ends of described elastomer [5] is wedge shape less than the thickness L2 near little joint one end.
2. a kind of spring bearing according to claim 1 is characterized in that, the thickness of described metal spacer [3] is identical.
3. a kind of spring bearing according to claim 1 is characterized in that, the upper-end surface of little joint [1] is protruding spherical crown surface, and the lower end surface of big joint [2] is recessed spherical crown surface, and all metal spacers [3] all are the spherical crown surfaces.
4. a kind of spring bearing according to claim 3, it is characterized in that, the external diameter minimum of the metal spacer [3] of the little joint of adjacency [1], the external diameter maximum of the metal spacer [3] of the big joint [2] of adjacency, the external diameter of middle metal spacer [3] reduces from the top down gradually.
5. a kind of spring bearing according to claim 4 is characterized in that, the centre of sphere on each spherical crown surface is arranged vertically successively from top to bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220729041 CN203051486U (en) | 2012-12-26 | 2012-12-26 | Support bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220729041 CN203051486U (en) | 2012-12-26 | 2012-12-26 | Support bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203051486U true CN203051486U (en) | 2013-07-10 |
Family
ID=48734443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220729041 Expired - Lifetime CN203051486U (en) | 2012-12-26 | 2012-12-26 | Support bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203051486U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109520736A (en) * | 2018-11-12 | 2019-03-26 | 中国直升机设计研究所 | A kind of spring bearing durability test device |
| CN110901953A (en) * | 2019-12-04 | 2020-03-24 | 中国直升机设计研究所 | Intelligent elastic bearing and state monitoring system thereof |
-
2012
- 2012-12-26 CN CN 201220729041 patent/CN203051486U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109520736A (en) * | 2018-11-12 | 2019-03-26 | 中国直升机设计研究所 | A kind of spring bearing durability test device |
| CN110901953A (en) * | 2019-12-04 | 2020-03-24 | 中国直升机设计研究所 | Intelligent elastic bearing and state monitoring system thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130710 |