CN202209393U - Inner hole bonding prevention structure for planet gear - Google Patents
Inner hole bonding prevention structure for planet gear Download PDFInfo
- Publication number
- CN202209393U CN202209393U CN2011203386528U CN201120338652U CN202209393U CN 202209393 U CN202209393 U CN 202209393U CN 2011203386528 U CN2011203386528 U CN 2011203386528U CN 201120338652 U CN201120338652 U CN 201120338652U CN 202209393 U CN202209393 U CN 202209393U
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- CN
- China
- Prior art keywords
- inner hole
- planet gear
- prevention structure
- circular arc
- bonding prevention
- 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 discloses an inner hole bonding prevention structure for a planet gear. The axial section of the wall of the inner hole of the planet gear has an inner-convex circular arc shape, the inner diameter between the highest parts of circular arch convexes on two sides is equal to the nominal dimension and the tolerance of the inner hole, and the inner diameter of the orifices in two ends, which is gradually increased along the circular arc, is larger than the nominal dimension by 0.01-0.06mm. According to the inner hole bonding prevention structure, the inner diameters of the orifices in two ends of the inner hole are designed to be slightly larger than the middle inner hole, the aim is that a certain gap can be reserved for storing lubrication oil, an oil film is easy to form due to the rotation under the full reservation of the lubrication oil, the dry friction can be avoided due to the oil film between the frictional pairs, the bonding accidents do not happen, and the service life is prolonged greatly, the inner hole bonding prevention structure is simple, easy to manufacture, good in bonding prevention effect, and is particularly suitable for being used in the inner hole of the planet gear of a differential of a heavy truck.
Description
Technical field
The utility model relates to a kind of gear structure design, and specifically, the utility model relates to the planetary pinion endoporus anti-stick structure in a kind of automobile differential.
Background technique
Gear is a kind of mechanical parts of transmitting torque, and the bore of rotation and static supporting axle are a pair of friction pairs, must have between the two to lubricate preferably could guarantee to run well.The automobile differential planetary pinion belongs to a kind of driving component under the low-speed heave-load operating mode, the lubricated particular importance when its endoporus pivots, otherwise friction pair is prone to produce high temperature, even produce the bonding phenomenon.The planetary pinion endoporus cooperates with a supporting between centers crack in the existing technology, and its endoporus is conventional round straight hole, and lubricant oil is among the gap, and this lubricating condition can satisfy usage requirement fully under the normal condition.When automobile under heavily loaded situation during differential, because of unit area load is big, existing lubricating condition can not satisfy usage requirement, is prone to cause that friction pair is overheated and produce bonding and damage.
The model utility content
The utility model is primarily aimed at the deficiency of existing technology, proposes a kind of planetary pinion endoporus anti-stick structure, and this is simple and reasonable for structure, be prone to make, and can significantly improve lubricating condition, improves planetary pinion working life.
The utility model is realized technical goal through following technical proposals.
Planetary pinion endoporus anti-stick structure; Its improvements are: planetary inner hole wall axial cross section is convex circular arc; Internal diameter between the circular arc evagination highest point of both sides equals endoporus nominal size and tolerance, and aperture, the two ends internal diameter that suitable circular arc strengthens gradually is greater than nominal size 0.01mm～0.06mm.
The utility model compared with prior art has following good effect:
1, the endoporus anti-stick is simple in structure, is prone to make;
2, the purpose of endoporus was a headspace in the middle of aperture, two ends internal diameter was slightly larger than; Be convenient to lubricant oil and infiltrate, rotation is prone to form oil film under the condition that lubricant oil fully retains, and the oil film between the friction pair exists avoids taking place dry friction; Can not produce the bonding accident, improve working life greatly.
Description of drawings
Fig. 1 is the utility model axial cross section schematic representation.
Fig. 2 is an existing technology axial cross section schematic representation.
Embodiment
According to accompanying drawing and combine embodiment, the utility model is described further below.
Planetary pinion endoporus anti-stick structure shown in Figure 1; Present embodiment is the planetary pinion in the 6MT automobile differential of Great Wall; The endoporus of this gear is of a size of Φ 19
mm; The inner hole wall axial cross section is convex circular arc; Internal diameter between the circular arc evagination highest point of both sides equals endoporus nominal size and tolerance; Be Φ 19
mm; Aperture, the two ends internal diameter that strengthens gradually along circular arc is slightly larger than nominal size 0.01mm～0.06mm, i.e. Φ 19.02mm～Φ 19.12mm.Endoporus in the middle of the utility model is designed to aperture, endoporus two ends internal diameter to be slightly larger than; Its objective is and reserve the certain clearance storing lubricating oil; Rotation is prone to form oil film under the sufficient condition of lubricant oil; Exist oil film can avoid taking place dry friction between the friction pair, can not produce the bonding accident, improve working life greatly.
Claims (1)
1. planetary pinion endoporus anti-stick structure; It is characterized in that: planetary inner hole wall axial cross section is convex circular arc; Internal diameter between the circular arc evagination highest point of both sides equals endoporus nominal size and tolerance, and aperture, the two ends internal diameter that suitable circular arc strengthens gradually is greater than nominal size 0.01mm～0.06mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203386528U CN202209393U (en) | 2011-09-09 | 2011-09-09 | Inner hole bonding prevention structure for planet gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203386528U CN202209393U (en) | 2011-09-09 | 2011-09-09 | Inner hole bonding prevention structure for planet gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202209393U true CN202209393U (en) | 2012-05-02 |
Family
ID=45988941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203386528U Expired - Lifetime CN202209393U (en) | 2011-09-09 | 2011-09-09 | Inner hole bonding prevention structure for planet gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202209393U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359570A (en) * | 2011-09-09 | 2012-02-22 | 江苏飞船股份有限公司 | Anti-adhesion structure for inner hole of planetary gear |
| CN107882957A (en) * | 2017-11-25 | 2018-04-06 | 洛阳华冠齿轮股份有限公司 | A kind of new straight-tooth cone tooth inner hole of planetary gear structure |
-
2011
- 2011-09-09 CN CN2011203386528U patent/CN202209393U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359570A (en) * | 2011-09-09 | 2012-02-22 | 江苏飞船股份有限公司 | Anti-adhesion structure for inner hole of planetary gear |
| CN107882957A (en) * | 2017-11-25 | 2018-04-06 | 洛阳华冠齿轮股份有限公司 | A kind of new straight-tooth cone tooth inner hole of planetary gear structure |
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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: 20120502 |