CN202971820U - Change gear for powder metallurgy - Google Patents
Change gear for powder metallurgy Download PDFInfo
- Publication number
- CN202971820U CN202971820U CN 201220618450 CN201220618450U CN202971820U CN 202971820 U CN202971820 U CN 202971820U CN 201220618450 CN201220618450 CN 201220618450 CN 201220618450 U CN201220618450 U CN 201220618450U CN 202971820 U CN202971820 U CN 202971820U
- Authority
- CN
- China
- Prior art keywords
- gear
- lightening grooves
- powder metallurgy
- ring
- change gear
- 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 - Fee Related
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- Gears, Cams (AREA)
Abstract
The utility model discloses a change gear for powder metallurgy. The change gear comprises a gear plate and a gear column arranged on a center shaft of the gear plate, wherein the gear column and the gear plate are integrally formed, the gear column is internally provided with a center shaft hole, a ring-shaped weight reducing groove is formed in a concave way on the upper surface and/or the lower surface of the gear plate, and the ring-shaped weight reducing groove is distributed in the shape of a ring which is homocentric with the center shaft hole. The ring-shaped weight reducing groove is additively arranged on the change gear for powder metallurgy, the center shaft of the ring-shaped weight reducing groove is coincided with the center shaft of the gear plate, the original hardness and density of the gear can not be influenced, the transmission load among gears can be reduced after the weight of the gear is reduced, and the transmission efficiency can be improved.
Description
Technical field
The utility model relates to a kind of mechanical transmissioning technology field, relates in particular to a kind of powder metallurgy speed change gear.
Background technique
Gear is a kind of mechanical parts that transmit motion and power by the continuous engagement of the tooth on wheel rim, and is extremely extensive in the application of mechanical transmission and whole mechanical field.General along with means of a powder metallurgy technique, powder metallurgical gear is able to develop rapidly and generally application.Powder metallurgical gear does not need other aftertreatment technologys by single forming and finishing process, just can reach the required precision of gear size fully, especially profile accuracy requirement.Means of a powder metallurgy technique is compared with traditional machining process, all greatly reduces on material drops into and makes.
Yet it is to be optimized that powder metallurgical gear also exists some problems to have, and when powder metallurgical gear weight is larger, brought inconvenience both for the installation of gear, also increased the transmission load between gear, causes the life-span of transmission efficiency decline, complete machine to be reduced.
The model utility content
For the deficiencies in the prior art, the utility model proposes a kind of powder metallurgy speed change gear, can realize the loss of weight of gear in the hardness that keeps gear, density.
In order to achieve the above object, the technological scheme that adopts of the utility model is as follows:
A kind of powder metallurgy speed change gear, comprise that a gear disk, is positioned at the Cylindrical Gear on the gear disk central shaft, this Cylindrical Gear and gear disk are one-body molded, be provided with central shaft hole in Cylindrical Gear, be recessed to form annular lightening grooves on described gear disk upper surface and/or lower surface, this annular lightening grooves is the circular distribution concentric with central shaft hole.
Preferably, the cross section of described lightening grooves is trapezoidal, and along with the intensification of lightening grooves cup depth, the width of lightening grooves cross section reduces.
Preferably, the lightening grooves of the lightening grooves of upper surface and lower surface gear disk projection in the plane overlap.
Than prior art, the beneficial effects of the utility model are: the utility model has been set up annular lightening grooves on speed change gear, the central shaft of annular lightening grooves overlaps with the central shaft of gear disk, can not affect the original hardness of gear and density, simultaneously after the gear loss of weight, reduce the transmission load between gear, improved transmission efficiency.
Description of drawings
Fig. 1 is the sectional view of a kind of powder metallurgy speed change gear of the utility model;
Fig. 2 is the plan view of a kind of powder metallurgy speed change gear of the utility model.
Embodiment
Below, by reference to the accompanying drawings and embodiment, the utility model is described further, so that clearerly understand the utility model technological thought required for protection.
As shown in Figure 1, be the structural representation of a kind of powder metallurgy speed change gear of the utility model, comprise integrated gear disk 11 and Cylindrical Gear 12, Cylindrical Gear 12 is positioned on gear disk 11 central shafts.Be provided with central shaft hole 121 in Cylindrical Gear 12, central shaft hole 121 is in the center of gear disk 11.
Have at least in gear disk 11 upper and lower surfaces to be recessed to form annular lightening grooves 111 on a surface, lightening grooves 111 is the circular distribution concentric with central shaft hole 121.
As preferably, the cross section of lightening grooves 111 is trapezoidal, and along with the intensification of lightening grooves 111 cup depths, the width of lightening grooves 111 cross sections reduces.
Upper surface and lower surface at gear disk 11 can arrange lightening grooves 111, comprise on one lightening grooves and lightening grooves once, and upper lightening grooves and lower lightening grooves overlap in 11 projections in the plane of gear disk.Simultaneously, in the utility model, also can be only at upper surface or only at lower surface, lightening grooves 111 is set.
The utility model has been set up annular lightening grooves on speed change gear, the central shaft of annular lightening grooves overlaps with the central shaft of gear disk, can not affect the original hardness of gear and density, simultaneously after the gear loss of weight, reduce the transmission load between gear, improved transmission efficiency.
For a person skilled in the art, can make other various corresponding changes and distortion according to technological scheme described above and design, and these all changes and the distortion all should belong to the protection domain of the utility model claim within.
Claims (3)
1. powder metallurgy speed change gear, comprise that a gear disk, is positioned at the Cylindrical Gear on the gear disk central shaft, this Cylindrical Gear and gear disk are one-body molded, be provided with central shaft hole in Cylindrical Gear, it is characterized in that: be recessed to form annular lightening grooves on described gear disk upper surface and/or lower surface, this annular lightening grooves is the circular distribution concentric with central shaft hole.
2. powder metallurgy speed change gear as claimed in claim 1, it is characterized in that: the cross section of described lightening grooves is trapezoidal, and along with the intensification of lightening grooves cup depth, the width of lightening grooves cross section reduces.
3. powder metallurgy speed change gear as claimed in claim 1 or 2 is characterized in that: the lightening grooves of upper surface and the lightening grooves of lower surface gear disk projection in the plane overlap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220618450 CN202971820U (en) | 2012-11-20 | 2012-11-20 | Change gear for powder metallurgy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220618450 CN202971820U (en) | 2012-11-20 | 2012-11-20 | Change gear for powder metallurgy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202971820U true CN202971820U (en) | 2013-06-05 |
Family
ID=48512897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220618450 Expired - Fee Related CN202971820U (en) | 2012-11-20 | 2012-11-20 | Change gear for powder metallurgy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202971820U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111802109A (en) * | 2020-07-28 | 2020-10-23 | 金华市宇辰粉末冶金有限公司 | Transmission assembly for pruning shears |
-
2012
- 2012-11-20 CN CN 201220618450 patent/CN202971820U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111802109A (en) * | 2020-07-28 | 2020-10-23 | 金华市宇辰粉末冶金有限公司 | Transmission assembly for pruning shears |
| WO2022021473A1 (en) * | 2020-07-28 | 2022-02-03 | 金华市宇辰粉末冶金有限公司 | Drive assembly for pruning shears |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130605 Termination date: 20201120 |