CN103148200B - A kind of epicyclic gearbox shock resistance flexible connecting structure - Google Patents
A kind of epicyclic gearbox shock resistance flexible connecting structure Download PDFInfo
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- CN103148200B CN103148200B CN201310087338.0A CN201310087338A CN103148200B CN 103148200 B CN103148200 B CN 103148200B CN 201310087338 A CN201310087338 A CN 201310087338A CN 103148200 B CN103148200 B CN 103148200B
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- ring gear
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Abstract
The invention discloses a kind of epicyclic gearbox shock resistance flexible connecting structure, the casing of structure uses separate type, and planetary annular is bolted with upper and lower casing, and lower box is fixed.Two elastic opening pins are respectively arranged in the pin-and-hole of upper box and ring gear, ring gear and lower box.Applying pretightning force on bolt, the contact surface at upper box and ring gear and lower box and ring gear forms certain initial contact normal pressure.Under nominal situation, bolt pretightening the frictional force provided overcomes external load, ring gear not sliding.The frictional resistance produced by normal pressure under impact loading is not enough to balance the tangential force of ring gear, and ring gear sliding produces flexible buffer, prevents the gear teeth from rupturing；Adjust the pretightning force of bolt and the number of elastic opening pin and the flexibility of THICKNESS CONTROL structure, prevent ring gear excessive slip, it is ensured that the intensity of bolt.
Description
Technical field
The present invention relates to a kind of epicyclic gearbox ring gear casing shock resistance flexible connecting structure.
Background technology
Planetary Gear Transmission is a kind of important type of belt drive, and have not available for general gear drive is many
Advantage, such as compact conformation, gear ratio are big, efficiency is high and bearing capacity is strong etc., thus progressively instead of elder generation
Before ordinary gear transmission and be widely used in machine-building, Aero-Space, wind-powered electricity generation, automobile steamer etc.
In field.In aviation field, the most end one-level almost all in Helicopter Main Reducer have employed planet tooth
Wheel type of belt drive.
The load working condition of epicyclic gearbox is complicated, and amplitude of variation is big, if designing planetary gear according to peak load
Case, then structural volume is huge, Strength surplus, and processing and manufacturing cost increases.Therefore equivalent load design is used
Method, is processed into equivalent load by the loading spectrum of epicyclic gearbox according to certain method and is designed, designed
Gear box structure size meet major part working condition requirement.But under shock loading, according to equivalent load method
The structural strength being designed cannot meet requirement, it is therefore desirable to improves the structure of gear-box, improves
Its shock resistance.Proposing a kind of epicyclic gearbox shock resistance flexible connecting structure, this structure can be effective
Ground solves partially to flexibly connect casing under shock loading and there is bolt fracture and the wheel of the casing that is partially rigidly connected existence
Tooth breakage phenomenon.
Summary of the invention
It is an object of the invention to provide a kind of epicyclic gearbox shock resistance flexible connecting structure.
The technical scheme is that, a kind of epicyclic gearbox shock resistance flexible connecting structure, ring gear casing
Use separate type, be divided into upper box, ring gear and lower box, upper box, ring gear and lower box are opened
Having bolt hole, upper box, ring gear and lower box are connected by the bolt being contained in bolt hole.
Having pin-and-hole on upper box, ring gear and lower box, two elastic opening pins are respectively arranged in top box
In the pin-and-hole of body and ring gear, ring gear and lower box.
The present invention has the following technical effect that: the most in normal conditions, bolt pretightening the friction provided
Power overcomes external load, and ring gear does not occur sliding, and gear teeth structure designs according to equivalent load design method, by force
It is the most qualified to spend.2. the flexible connecting structure of planet casing ensures the gear teeth under shock loading operating mode
Intensity meet requirement, it is to avoid the structural volume caused according to maximum load design gear case is huge, intensity
Situation more than needed, not only meets design requirement but also reduces cost.3. flexible connecting structure uses separate type, top box
Body, lower box material are different from high performance ring gear material, and ring gear uses quality material, compares monoblock type
Employing quality material is cost-effective, and renewal part is more convenient in fault and maintenance.4. elastic opening
Pin prevents the bolt fracture that ring gear excessive slip causes, by adjusting screw bolt pretightening force and elastic opening
The quantity of pin can control casing flexibility.
Accompanying drawing explanation
Fig. 1 is axonometric chart of the present invention.
Fig. 2 is the A-A part section structural representation that the present invention is unkitted bolt and elastic opening pin.
Fig. 3 is the A-A part section structural representation that the present invention is mounted with bolt and elastic opening pin.
Detailed description of the invention
As shown in Figure 1, Figure 2, Figure 3 shows, a kind of single-stage planetary engagement case shock resistance flexible connecting structure, internal tooth
Circle casing 10 uses separate type, is divided into upper box 1, ring gear 4 and lower box 6, at upper box 1, internal tooth
Having bolt hole 7 on circle 4 and lower box 6, the bolt 2 being contained in bolt hole 7 is by upper box 1, ring gear
4 and lower box 6 connect；Sun gear 9 and planetary gear 8 and ring gear 4 engage, at upper box 1, internal tooth
Having pin-and-hole 3 on circle 4 and lower box 6, two elastic opening pins 5 are respectively arranged in upper box 1 and ring gear
4, in the pin-and-hole 3 of ring gear 4 and lower box 6.
Under nominal situation, during planet circular system operating, the gear teeth of ring gear by circumference tangential force and radial force, by
The tangential force of the frictional force balance ring gear that bolt pretightening produces, ring gear not sliding, structure is rigidity,
Because gear designs according to rated load, the gear teeth are in elastic deformation stage.
Under shock loading, peak load instantaneously acts on the gear teeth, if structural rigidity is too sufficient, and the suffered punching of the gear teeth
Hitting merit will be very big, and the energy foot that the gear teeth absorb makes gear teeth plastic deformation even rupture.In order to ensure that the gear teeth are not
Fracture, need the buffering flexible certain to the gear teeth.Shock loading work a part can overcome frictional resistance to do
Merit, a part is stored in resilient key and bolt, is converted into the strain energy of resilient key and bolt, another part
Being converted into the strain energy of the gear teeth, now the gear teeth remain at the state of elastic deformation, and stress is less than yield limit
Stress value.
Bolt pretightening increases, then attachment structure flexibility reduces, and ring gear skidding distance reduces, and the gear teeth are flexible
Buffering reduces；Bolt pretightening reduces, then ring gear skidding distance increases, and gear teeth flexibility increases.Bolt is pre-
In the case of clamp force is certain, elastic opening pin number and rigidity increase, and attachment structure flexibility reduces；Elasticity is opened
Mouth pin number and rigidity reduce, and attachment structure flexibility increases.Can prevent bolt large deformation from leading by controlling flexibility
The fracture caused.
Claims (1)
1. an epicyclic gearbox shock resistance flexible connecting structure, it is characterised in that: ring gear casing (10)
Use separate type, be divided into upper box (1), ring gear (4) and lower box (6), at upper box (1), ring gear (4)
And have bolt hole (7) on lower box (6), the bolt (2) being contained in bolt hole (7) pass through certain bolt pretightening
Upper box (1), ring gear (4) and lower box (6) are connected；At upper box (1), ring gear (4) and lower box (6)
On have pin-and-hole (3), two elastic opening pins (5) are respectively arranged in upper box (1) and ring gear (4), ring gear
(4) and in the pin-and-hole (3) of lower box (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310087338.0A CN103148200B (en) | 2013-03-19 | 2013-03-19 | A kind of epicyclic gearbox shock resistance flexible connecting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310087338.0A CN103148200B (en) | 2013-03-19 | 2013-03-19 | A kind of epicyclic gearbox shock resistance flexible connecting structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103148200A CN103148200A (en) | 2013-06-12 |
| CN103148200B true CN103148200B (en) | 2016-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310087338.0A Active CN103148200B (en) | 2013-03-19 | 2013-03-19 | A kind of epicyclic gearbox shock resistance flexible connecting structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN103148200B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103192941B (en) * | 2013-04-12 | 2015-04-08 | 江苏飞马动力科技有限公司 | Suspension internal gear structure for reducing noise of high-speed motor of electric bicycle |
| CN104747690A (en) * | 2013-12-27 | 2015-07-01 | 现代岱摩斯股份有限公司 | A gearbox structure with an integrated type locating pin and an assembling method |
| EP3139067B1 (en) | 2015-09-04 | 2022-11-09 | Desch Antriebstechnik GmbH & Co. KG | Planetary gear unit |
| CN108626322A (en) * | 2018-04-16 | 2018-10-09 | 哈尔滨工程大学 | A kind of gear ring segmented helical teeth planetary reduction gear |
| CN109374292B (en) * | 2018-10-11 | 2021-04-09 | 湘潭大学 | Device for measuring impact resistance flexible structure strength and flexibility of planetary gear box |
| CN111022623B (en) * | 2019-10-12 | 2020-12-01 | 重庆大学 | Planet carrier structure with flexible floating and load balancing functions |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2591824A1 (en) * | 1985-12-18 | 1987-06-19 | Paris & Du Rhone | Improved system for suspending the internally toothed outer crown wheel of an epicyclic reduction gear with respect to a fixed sleeve surrounding this reduction gear |
| CN201751629U (en) * | 2010-01-28 | 2011-02-23 | 湖北博创机械制造有限责任公司 | Planetary reduction gear with herringbone teeth |
| CN102042369A (en) * | 2010-12-28 | 2011-05-04 | 上海合纵重工机械有限公司 | Improved planetary reducer |
| CN201858308U (en) * | 2010-11-02 | 2011-06-08 | 大连新氏传动科技有限公司 | Double-helical-teeth planetary speed reducer |
-
2013
- 2013-03-19 CN CN201310087338.0A patent/CN103148200B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2591824A1 (en) * | 1985-12-18 | 1987-06-19 | Paris & Du Rhone | Improved system for suspending the internally toothed outer crown wheel of an epicyclic reduction gear with respect to a fixed sleeve surrounding this reduction gear |
| CN201751629U (en) * | 2010-01-28 | 2011-02-23 | 湖北博创机械制造有限责任公司 | Planetary reduction gear with herringbone teeth |
| CN201858308U (en) * | 2010-11-02 | 2011-06-08 | 大连新氏传动科技有限公司 | Double-helical-teeth planetary speed reducer |
| CN102042369A (en) * | 2010-12-28 | 2011-05-04 | 上海合纵重工机械有限公司 | Improved planetary reducer |
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| CN103148200A (en) | 2013-06-12 |
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