CN203926349U - A kind of rotor axis of electric - Google Patents
A kind of rotor axis of electric Download PDFInfo
- Publication number
- CN203926349U CN203926349U CN201420239367.4U CN201420239367U CN203926349U CN 203926349 U CN203926349 U CN 203926349U CN 201420239367 U CN201420239367 U CN 201420239367U CN 203926349 U CN203926349 U CN 203926349U
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- CN
- China
- Prior art keywords
- serration
- flute profile
- electric
- rotor axis
- steel plate
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- 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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- Manufacture Of Motors, Generators (AREA)
- Motor Or Generator Current Collectors (AREA)
Abstract
The utility model discloses a kind of rotor axis of electric, adopt 40Cr material, it is characterized in that: rotor axis of electric comprises left supporting section, commutator construction section, silicon steel plate construction section, driving cog shaft part and the right supporting section that arrange left and right, the periphery of left supporting section arranges the fan-shaped straight trough in many places in a circumferential direction, in fan-shaped straight trough, fill sinter from metal powder, the periphery of silicon steel plate construction section gathers longitudinal serration is set in a circumferential direction, longitudinally serration comprises pointed tooth flute profile serration and trapezoidal flute profile serration, and pointed tooth flute profile serration and trapezoidal flute profile serration are crisscross arranged.The utility model duration of work can not add or not lubricating oil filling of long period, can also improve the assembly quality of rotor simultaneously.
Description
Technical field
The utility model relates to a kind of motor of small-sized electric tool, is specifically related to a kind of rotor axis of electric.
Background technique
The little rotating speed of motor general size of small-sized electric tool is high, the situation that also has poor lubrication having.Current a kind of rotor axis of electric, structure is such: left supporting section, commutator construction section, silicon steel plate construction section, driving cog shaft part and the right supporting section arranged by left and right form, entirety adopts 40Cr material, left supporting section is light face, when work, supported by sliding bearing, the excircle of silicon steel plate construction section is provided with the pointed tooth straight burr that roll extrusion forms, and is convenient to the position that is pressed into of silicon steel plate.The deficiency that above-mentioned rotor axis of electric exists is: 1. the poor lubrication of left supporting section can not well be lubricated, and needs frequent lubricating oil filling to be lubricated, and not so affects motor working life; If 2. silicon steel plate construction section clamp precision in the time packing silicon steel plate into can not ensure, silicon steel plate is easy to deflection and exceeds standard with the error of perpendicularity of rotor axis of electric after installation so, affects the assembly quality of rotor, equally also affects motor quality.
Summary of the invention
In view of the deficiency of background technique, the purpose of this utility model aims to provide that a kind of duration of work can not add or not lubricating oil filling of long period, improves the rotor axis of electric of rotor assembly quality.
The utility model takes following technological scheme to complete:
A kind of rotor axis of electric, adopt 40Cr material, it is characterized in that: rotor axis of electric comprises left supporting section, commutator construction section, silicon steel plate construction section, driving cog shaft part and the right supporting section that arrange left and right, the periphery of left supporting section arranges the fan-shaped straight trough in many places in a circumferential direction, fills sinter from metal powder in fan-shaped straight trough.
Adopt after technique scheme, utilize the porosity of sinter from metal powder, make it soaking by lubricating oil under voluntarily for oil condition.When motor rotation, bearing temperature raises, and because oily expansion coefficient is larger than metal, thereby automatically enters the left supporting section of slidingsurface with lubrication motor rotor shaft, and while quitting work, oil is again with the temperature sucked back hole that declines.So, the left supporting section of rotor axis of electric can not add or not lubricating oil filling of long period during operation, thereby improves motor working life.
As preferably, sinter from metal powder adopts antifriction material of powder metallurgy.Utilize the porosity characteristic of powdered metallurgical material, can make lubricant oil be full of hole, and then improve the greasy property of the left supporting of rotor axis of electric.
As preferably, the periphery of silicon steel plate construction section gathers longitudinal serration is set in a circumferential direction, and longitudinally serration comprises pointed tooth flute profile serration and trapezoidal flute profile serration, and pointed tooth flute profile serration and trapezoidal flute profile serration are crisscross arranged.Because pointed tooth flute profile serration is beneficial to silicon steel plate and is pressed against on rotor shaft, trapezoidal flute profile serration is beneficial to and when silicon steel plate is pressed on rotor shaft, is not easy to occur deflection, so under effective cooperation of pointed tooth flute profile serration and trapezoidal flute profile serration, make silicon steel plate ensure that squareness tolerance can be pressed against again on rotor axis of electric like a cork, improve the assembly quality of rotor, equally also guaranteed motor quality.
As preferably, two corresponding trapezoidal flute profile serrations of pointed tooth flute profile serration are crisscross arranged.
Brief description of the drawings
The utility model has following accompanying drawing:
Fig. 1 is structural representation of the present utility model,
Fig. 2 is the A-A sectional view of Fig. 1,
Fig. 3 is the B-B sectional view of Fig. 1.
Embodiment
As shown in the figure, rotor axis of electric of the present utility model, adopt 40Cr material, comprise the sheathed sliding bearing of left supporting section 1(cylindrical that arrange left and right), commutator construction section 2(cylindrical installs commutator), silicon steel plate construction section 3(cylindrical installs silicon steel plate), driving cog shaft part 4 and right supporting section 5, the periphery of left supporting section 1 arranges fan-shaped straight trough everywhere in a circumferential direction, in fan-shaped straight trough, fill sinter from metal powder 6(taking metallic dust as main raw material, the sintering body of making by powder metallurgic method), sinter from metal powder 6 adopts antifriction material of powder metallurgy; The periphery of silicon steel plate construction section 3 gathers longitudinal serration is set in a circumferential direction, and longitudinally serration comprises that pointed tooth flute profile serration 8 and the corresponding trapezoidal flute profile serration 7 of 7, two pointed tooth flute profile serrations of trapezoidal flute profile serration 8 are crisscross arranged.
Claims (4)
1. a rotor axis of electric, adopt 40Cr material, it is characterized in that: rotor axis of electric comprises left supporting section, commutator construction section, silicon steel plate construction section, driving cog shaft part and the right supporting section that arrange left and right, the periphery of left supporting section arranges the fan-shaped straight trough in many places in a circumferential direction, fills sinter from metal powder in fan-shaped straight trough.
2. a kind of rotor axis of electric as claimed in claim 1, is characterized in that: sinter from metal powder adopts antifriction material of powder metallurgy.
3. a kind of rotor axis of electric as claimed in claim 1, it is characterized in that: the periphery of silicon steel plate construction section gathers longitudinal serration is set in a circumferential direction, longitudinally serration comprises pointed tooth flute profile serration and trapezoidal flute profile serration, and pointed tooth flute profile serration and trapezoidal flute profile serration are crisscross arranged.
4. a kind of rotor axis of electric as claimed in claim 3, is characterized in that: two corresponding trapezoidal flute profile serrations of pointed tooth flute profile serration are crisscross arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420239367.4U CN203926349U (en) | 2014-05-12 | 2014-05-12 | A kind of rotor axis of electric |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420239367.4U CN203926349U (en) | 2014-05-12 | 2014-05-12 | A kind of rotor axis of electric |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203926349U true CN203926349U (en) | 2014-11-05 |
Family
ID=51822164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420239367.4U Expired - Fee Related CN203926349U (en) | 2014-05-12 | 2014-05-12 | A kind of rotor axis of electric |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203926349U (en) |
-
2014
- 2014-05-12 CN CN201420239367.4U patent/CN203926349U/en not_active Expired - Fee Related
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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 |
Granted publication date: 20141105 Termination date: 20150512 |
|
| EXPY | Termination of patent right or utility model |