CN208866393U - A kind of hollow oiliness bearing of powder metallurgy - Google Patents
A kind of hollow oiliness bearing of powder metallurgy Download PDFInfo
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- CN208866393U CN208866393U CN201821653444.5U CN201821653444U CN208866393U CN 208866393 U CN208866393 U CN 208866393U CN 201821653444 U CN201821653444 U CN 201821653444U CN 208866393 U CN208866393 U CN 208866393U
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Abstract
A kind of hollow oiliness bearing of powder metallurgy, including powder metallurgy oil-impregnated bearing, the inner hole of the hollow oiliness bearing of powder metallurgy are the stepped holes that both ends internal diameter is small, intermediate internal diameter is big；The excircle of the hollow oiliness bearing of powder metallurgy circumferentially has a circle anti-back slope, in case bearing will appear axial the problem of falling off；The excircle of the hollow oiliness bearing of powder metallurgy axially has an anti-rotation groove, provides a circumferential registration to bearing, can also reduce bearing and the possibility axially to fall off occurs；The molding of the hollow oiliness bearing stepped hole of powder metallurgy is using the technique for including following two step: the first step, molding, the plug used in the mold process of the first step has a step, second step, finishing, the middle mould pressed again have a slope section, to form the anti-back slope of outer circle, the plug pressed again uses cylinder plug, and the diameter of plug is equal to the hollow oiliness bearing both ends hole diameter of powder metallurgy.Solves the problems such as split type bearing junction fracture, axis, dystopy.
Description
Technical field
The utility model relates to a kind of hollow oiliness bearings of powder metallurgy.
Background technique
Since powder metallurgy has the characteristics that Porous, and have in the fabrication process can freer adjustment apertures number
Amount, size, shape and distribution can be used to manufacture oiliness bearing, will be using two containing only oily axis in a kind of shell of small and special electric machine
It holds and is integrally formed by Shooting Technique and casing, in actual application, two concentricitys containing only oil bearing is difficult to ensure, and
And two make bearing failure containing only meeting strike-through between oil bearing, in addition bearing in the outer part there is also axial the problem of falling off.
Utility model content
The purpose of this utility model seeks to provide a kind of hollow oiliness bearing of the powder metallurgy that can solve the above problem.
The utility model adopts the following technical solution:
A kind of hollow oiliness bearing of powder metallurgy, including powder metallurgy oil-impregnated bearing；
The inner hole of the hollow oiliness bearing of powder metallurgy is the stepped hole that both ends internal diameter is small, intermediate internal diameter is big；
The excircle of the hollow oiliness bearing of powder metallurgy circumferentially has a circle anti-back slope, in case bearing will appear axial direction
The problem of falling off；
Optimization, the excircle of the hollow oiliness bearing of powder metallurgy axially has an anti-rotation groove, provides one to bearing
Circumferential registration can also reduce bearing and the possibility axially to fall off occurs；
The problem of in view of demoulding, it includes following two step that the molding of the hollow oiliness bearing stepped hole of powder metallurgy, which uses,
Technique:
The first step, molding, the plug used in the mold process of the first step have a step, can form powder metallurgy
The aperture green compact semi-finished product of the outer circle of hollow oiliness bearing and the middle section of large diameter and one end；
Second step, finishing, to the off size requirement of diameter of bore in the green compact semi-finished product by first step compression molding
The other end carries out multiple pressure, and the middle mould pressed again has a slope section, and to form the anti-back slope of outer circle, the plug pressed again is using circle
Tube filler stick, the diameter of plug are equal to the hollow oiliness bearing both ends hole diameter of powder metallurgy, again after pressure, pass through the multiple pressure side of extruding
Hole size be equal to plug diameter, realize the small purpose of design of finishing product both ends diameter.
The beneficial effects of the utility model are: conventional two-piece bearing is merged into a bearing, solves split type axis
The problems such as holding junction fracture, axis, dystopy, the hollow design for being reduce the contact surface of brearing bore and axis, substantially reduce
The generation of friction area and frictional heat avoids axis, reduces friction noise when operating, improves the service life of bearing, outer diameter
The step structure of upper design effectively prevent product working at high speed or running for a long time to generate dystopy phenomenon, when reducing operating
Noise.
Detailed description of the invention:
Attached drawing 1 is the schematic diagram that the utility model uses；
Attached drawing 2 is the structural schematic diagram of the utility model；
Attached drawing 3 is the schematic diagram of compression molding；
Attached drawing 4 is the schematic diagram of finishing；
Attached drawing 5 is the schematic diagram that two present seperated bearings use；
In figure, 11 be casing, and 12 be the utility model, and 13 be the anti-rotation groove of the utility model excircle axial direction, and 14 be outer
The anti-back slope of circumference, 21 be casing, 22 be seperated bearing 1,23 be seperated bearing 2,24 be seperated bearing 1 with
Seam between seperated bearing 2,3 be forming core rod, and 31 be the step on forming core rod, and 4 be mould in molding, and 41 be in molding
Step on mould；
Specific embodiment:
The utility model is described further with reference to the accompanying drawings and detailed description:
In Fig. 1 and Fig. 2, the hollow oiliness bearing 12 of powder metallurgy is moulded in shell 11, the hollow oil-containing axis of powder metallurgy
The inner hole for holding 12 is both ends diameter 1 and the stepped hole that diameter 3 is small, mid diameter 2 is big；
In Fig. 3, the excircle of the hollow oiliness bearing of powder metallurgy axially has an anti-rotation groove 13, provides a circumference to bearing
Positioning can also reduce bearing and the possibility axially to fall off occur, have a step 31 on forming core rod 3, can form powder smelting
The aperture green compact semi-finished product of the internal diameter 2 of the middle hole and one end of the internal diameter 1 of the hollow oiliness bearing of gold；
In Fig. 4, the excircle of the hollow oiliness bearing of powder metallurgy circumferentially has a circle anti-back slope 14, in case bearing will appear
The problem of axially falling off, the middle mould 4 pressed again has a slope section 41, to form the anti-back slope 14 of outer circle, the plug pressed again
Using cylinder plug, the diameter of plug is equal to the hollow oiliness bearing both ends hole diameter of powder metallurgy, and multiple pressure side is interior after multiple pressure
Pore size reaches requirement, since the hole size internal diameter 1 of multiple pressure side is realized by squeezing the green compact semi-finished product after being molded, no
It will affect the demoulding of finishing product；
Present scheme, bearing 22 and bearing 23 are shown in Fig. 5 to be assemblied in shell 21 by injection molding, 22 He of bearing
The problem of strike-through can occur in use in seam 24 between bearing 23, lead to bearing failure, outboard bearing 23 there is also to
The problem of outside axially falls off.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (3)
1. a kind of hollow oiliness bearing of powder metallurgy, including powder metallurgy oil-impregnated bearing, it is characterized in that the powder metallurgy is hollow
The inner hole of oiliness bearing is the stepped hole that both ends internal diameter is small, intermediate internal diameter is big；
The excircle of the hollow oiliness bearing of powder metallurgy circumferentially has a circle anti-back slope.
2. the hollow oiliness bearing of a kind of powder metallurgy according to claim 1, contains it is characterized in that the powder metallurgy is hollow
The excircle of oil bearing axially has an anti-rotation groove.
3. the hollow oiliness bearing of a kind of powder metallurgy according to claim 1, it is characterized in that molding includes that following technique walks
It is rapid:
The first step, molding, the plug used in the mold process of the first step have a step, it is hollow can to form powder metallurgy
The aperture green compact semi-finished product of the outer circle of oiliness bearing and the middle section of large diameter and one end；
The other end of off size requirement in the green compact semi-finished product by first step compression molding is answered in second step, finishing
Pressure, the middle mould pressed again have a slope section, and to form the anti-back slope of outer circle, the plug pressed again uses cylinder plug, plug
Diameter be equal to the hollow oiliness bearing both ends hole diameter of powder metallurgy, after multiple pressure, pass through the hole size of the multiple pressure side of extruding
Equal to the diameter of plug, the small purpose of design of finishing product both ends diameter is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821653444.5U CN208866393U (en) | 2018-10-12 | 2018-10-12 | A kind of hollow oiliness bearing of powder metallurgy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821653444.5U CN208866393U (en) | 2018-10-12 | 2018-10-12 | A kind of hollow oiliness bearing of powder metallurgy |
Publications (1)
| Publication Number | Publication Date |
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| CN208866393U true CN208866393U (en) | 2019-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821653444.5U Active CN208866393U (en) | 2018-10-12 | 2018-10-12 | A kind of hollow oiliness bearing of powder metallurgy |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109175381A (en) * | 2018-10-12 | 2019-01-11 | 常州格瑞特粉末冶金有限公司 | A kind of hollow oiliness bearing of powder metallurgy and moulding process |
-
2018
- 2018-10-12 CN CN201821653444.5U patent/CN208866393U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109175381A (en) * | 2018-10-12 | 2019-01-11 | 常州格瑞特粉末冶金有限公司 | A kind of hollow oiliness bearing of powder metallurgy and moulding process |
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