CN202251815U - Powder metallurgy gear ring - Google Patents
Powder metallurgy gear ring Download PDFInfo
- Publication number
- CN202251815U CN202251815U CN2011203590924U CN201120359092U CN202251815U CN 202251815 U CN202251815 U CN 202251815U CN 2011203590924 U CN2011203590924 U CN 2011203590924U CN 201120359092 U CN201120359092 U CN 201120359092U CN 202251815 U CN202251815 U CN 202251815U
- Authority
- CN
- China
- Prior art keywords
- gear
- face
- gear ring
- powder metallurgy
- teeth
- 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 a powder metallurgy gear ring which comprises a gear body (2) and gear teeth (1) arranged on the gear body (2), wherein end faces (3) of the gear teeth do not protrude from an end face (4) of the gear body, an included angle between the end face (4) of the gear body and the end faces (3) of the gear teeth is 4-6 DEG, a peak of the included angle is positioned on the end face of the gear body and is 0.1-0.2m away from the root circle, wherein m represents modulus. The working surface of the gear teeth of the gear ring is compacted, thus crushing strength of the gear ring can be remarkably improved, fatigue and surface abrasion performances of the powder metallurgy gear ring are improved, and bearing capacity and service life of a gear are improved.
Description
Technical field
The utility model relates to a kind of gear ring, particularly a kind of powder metallurgy gear ring.
Background technique
Powder metallurgy be produce metal or with metallic dust (or mixture of metallic dust and non-metal powder) as raw material, through being shaped and sintering, make the process engineering of metallic material, compound and all kinds goods.Gear ring (also claiming internal gear) is the important mechanical component of transmitting movement and power; The powder metallurgy gear ring is the powdered metal parts that generally uses in various automobiles, the motorcycle; Through single forming and finishing process; Do not need other aftertreatment technologys, can reach dimension precision requirement, especially profile accuracy fully.Therefore, and compare with the manufacturing of traditional mechanical processing method, in the material input with make and all significantly reduce, it is the typical products that embodies the powder metallurgy characteristics.
The general size design cylindrical die of gear per sample of powder metallurgy gear ring, lower (the about 7.0g/cm of the density of the gear ring blank of under certain pressing pressure, sintering process condition, producing
3), a large amount of hole that particularly exists in the surface and the inside at gear ring gear teeth place.In the course of the work, it is tired be prone to produce tooth root, and also produces rolling contact fatigue each other when working between the gear, thereby still can not directly be used for the transmission system of power.Though technologies such as employing temperature and pressure (warm compaction) or secondary compacting double sintering can improve the density (7.2g/cm of gear
3More than), but this can increase the processing cost of gear.
Hence one can see that, and the biggest factor that influences the powder metallurgy gear ring is a density, and the producer that therefore produces the powder metallurgy gear ring obtains excellent performance through the density that changes the powder metallurgy gear ring.
The model utility content
The purpose of the utility model provides a kind of powder metallurgy gear ring with higher gear teeth density and intensity.
In order to reach above-mentioned technical purpose; The technological scheme of the utility model is: a kind of powder metallurgy gear ring, comprise the gear teeth on gear mass and the gear mass, and the end face of the said gear teeth is the end face of projecting teeth wheel body not; Angle between the end face of gear mass and the end face of the gear teeth is 4-6 °; The summit of said angle is positioned on the end face of gear mass, and the distance of itself and root circle is 0.1-0.2m, and wherein m is a modulus.
In order to obtain better using effect, the angle between the end face of said gear mass and the end face of the gear teeth is designed to 5 °.
In order to guarantee the size and dimension precision of the powder metallurgy gear ring gear teeth, the summit of said angle is positioned on the end face of gear mass, and the distance of itself and root circle is 0.15m, and wherein m is a modulus.
The main feature of powder metallurgy gear ring transmission is that volume is little, and bearing capacity is big, stable working.The powder metallurgy gear ring of the utility model improves on the basis of drive mechanism than complicacy; On the basis that guarantees performances such as powder metallurgy gear ring bearing capacity; Wheel toothed portion at the powder metallurgy gear ring suitably adds gradient (4-6 °); The densification of gear ring gear teeth working surface can significantly improve the crushing strength and the crushing strength of gear, improves the fatigue and the surface abrasion performance of powder metallurgy gear ring, thereby improves its working life.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is done further detailed explanation.
Fig. 1 is the structural representation of existing powder metallurgy gear ring.
Fig. 2 is the structural representation of the utility model.
Embodiment
The powder metallurgy gear ring that uses at present is as shown in Figure 1; The powder metallurgy gear ring comprises the gear teeth 1 on gear mass 2 and the gear mass 2; Do not have angle between the end face 4 of gear mass and the end face 3 of the gear teeth, in pressing process because of lower its premature damage that causes of density at gear ring gear teeth place.
For the density that improves gear ring work gear teeth place to improve its service behaviour; The utility model does not change the overall structure of powder metallurgy gear ring; As shown in Figure 2, through being improved, the gear teeth 1 part obtains better technical effect, that is: adopt the not design of the end face 4 of projecting teeth wheel body of end face 3 of the said gear teeth; And the angle between the end face 3 of the end face 4 of gear mass and the gear teeth is designed to 4-6 °; The summit of said angle is positioned on the end face of gear mass, and the distance of itself and root circle is 0.1-0.2m, and wherein m is a modulus.After the utility model improves; Guaranteed the shape and size precision of gear ring; Gear ring gear teeth working surface densification simultaneously can significantly improve the crushing strength and the crushing strength of gear ring, improves the fatigue and the surface abrasion performance of powder metallurgy gear ring, thus the bearing capacity and the working life of improving gear ring.
Optimal way is: the angle between the end face of said gear mass and the end face of the gear teeth is designed to 5 °, and the summit of said angle is positioned on the end face of gear mass, and the distance of itself and root circle is 0.15m, and wherein m is a modulus.
The foregoing description limits the utility model never in any form, and every employing is equal to the technological scheme that replacement or the mode of equivalent transformation obtain and all drops in the protection domain of the utility model.
Claims (3)
1. powder metallurgy gear ring; Comprise the gear teeth (1) on gear mass (2) and the gear mass (2); It is characterized in that: the end face of the said gear teeth (3) is the end face of projecting teeth wheel body (4) not, and the angle between the end face (3) of the end face of gear mass (4) and the gear teeth is 4-6 °, and the summit of said angle is positioned on the end face of gear mass; The distance of itself and root circle is 0.1-0.2m, and wherein m is a modulus.
2. powder metallurgy gear ring according to claim 1 is characterized in that: the angle between the end face (3) of the end face of said gear mass (4) and the gear teeth is 5 °.
3. powder metallurgy gear ring according to claim 1 is characterized in that: the summit of said angle is positioned on the end face of gear mass, and the distance of itself and root circle is 0.15m, and wherein m is a modulus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203590924U CN202251815U (en) | 2011-09-23 | 2011-09-23 | Powder metallurgy gear ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203590924U CN202251815U (en) | 2011-09-23 | 2011-09-23 | Powder metallurgy gear ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202251815U true CN202251815U (en) | 2012-05-30 |
Family
ID=46113059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203590924U Expired - Lifetime CN202251815U (en) | 2011-09-23 | 2011-09-23 | Powder metallurgy gear ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202251815U (en) |
-
2011
- 2011-09-23 CN CN2011203590924U patent/CN202251815U/en not_active Expired - Lifetime
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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: 20120530 |