CN211449570U - Bearing-free powder metallurgy gear - Google Patents
Bearing-free powder metallurgy gear Download PDFInfo
- Publication number
- CN211449570U CN211449570U CN201922123656.3U CN201922123656U CN211449570U CN 211449570 U CN211449570 U CN 211449570U CN 201922123656 U CN201922123656 U CN 201922123656U CN 211449570 U CN211449570 U CN 211449570U
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- bearing
- powder metallurgy
- inner hole
- gear
- metallurgy gear
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Abstract
The utility model discloses a bearing-free powder metallurgy gear, which comprises an inner hole positioned in the center of the powder metallurgy gear, wherein the inner hole is provided with a plurality of arc-shaped oil storage grooves along the axial direction of the gear, and the oil storage grooves are uniformly distributed around the inner hole; the utility model discloses the structure, its inner hole does not need additionally to install the bearing, has not only reduced the technology step, has also reduced manufacturing cost simultaneously.
Description
Technical Field
The utility model relates to a exempt from bearing (or bush) powder metallurgy gear belongs to powder metallurgy and makes technical field.
Background
The bearing is generally arranged in an inner hole of the powder metallurgy gear, and the bearing has the functions of preventing a shaft from being directly abraded with the inner hole, reducing damage to the shaft, protecting the shaft and enabling the shaft to do reciprocating and rotating motion in the bearing. The bearing is installed inside the hole through interference fit, and the bearing needs to adopt external force to impress into the powder metallurgy gear hole promptly, and the bearing has not only increased the technology step with powder metallurgy bearing hole interference fit, and this kind of mode has also increased manufacturing cost.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a exempt from bearing powder metallurgy gear is provided, its hole does not need additionally to install the bearing.
In order to solve the technical problem, the utility model discloses a exempt from bearing powder metallurgy gear, including the hole that is located powder metallurgy gear center, along the gear shaft to, the hole has a plurality of (the preferred three) convex trapped oil recesses of trapped oil recess, trapped oil recess evenly distributed is around the hole.
In order to effectively avoid the influence of burrs generated by the die clearance on the appearance of the end face, two ends of the inner hole are provided with sunk grooves.
The utility model discloses the structure, its inner hole does not need additionally to install the bearing, has not only reduced the technology step, has also reduced manufacturing cost simultaneously.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a perspective view of the present invention.
Fig. 2 is a plan view of the present invention.
Detailed Description
As shown in figures 1 and 2, the bearing-free powder metallurgy gear comprises an inner hole 1 positioned in the center of the powder metallurgy gear, wherein the inner hole 1 is provided with three (unlimited) arc-shaped oil storage grooves 2 along the axial direction of the gear, and lubricating grease is placed in the oil storage grooves 2 to realize lubrication during gear rotation. The oil storage grooves 2 are uniformly distributed around the inner hole 1, and the two ends of the inner hole 1 are provided with sinking grooves 3. The inner hole 1 does not need to be additionally provided with a bearing, so that the direct opposite grinding of the shaft and the inner hole 1 is avoided, the process steps are reduced, and the production cost is also reduced.
The above-mentioned embodiment does not limit the utility model in any way, and all the technical solutions that adopt the mode of equivalent replacement or equivalent transform to obtain all fall within the protection scope of the utility model.
Claims (3)
1. Exempt from bearing powder metallurgy gear, including hole (1) that is located powder metallurgy gear center, its characterized in that: along the gear shaft, hole (1) has a plurality of circular arc oil storage grooves (2), oil storage grooves (2) evenly distributed are around hole (1).
2. The bearing-free powder metallurgy gear according to claim 1, wherein: the number of the oil storage grooves (2) is three.
3. The bearing-free powder metallurgy gear according to claim 1, wherein: the two ends of the inner hole (1) are provided with sinking grooves (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922123656.3U CN211449570U (en) | 2019-12-02 | 2019-12-02 | Bearing-free powder metallurgy gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922123656.3U CN211449570U (en) | 2019-12-02 | 2019-12-02 | Bearing-free powder metallurgy gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211449570U true CN211449570U (en) | 2020-09-08 |
Family
ID=72302614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922123656.3U Active CN211449570U (en) | 2019-12-02 | 2019-12-02 | Bearing-free powder metallurgy gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211449570U (en) |
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2019
- 2019-12-02 CN CN201922123656.3U patent/CN211449570U/en active Active
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