CN205780366U - The inclined raceway groove sealed-bearing of electric tool - Google Patents
The inclined raceway groove sealed-bearing of electric tool Download PDFInfo
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- CN205780366U CN205780366U CN201620246177.4U CN201620246177U CN205780366U CN 205780366 U CN205780366 U CN 205780366U CN 201620246177 U CN201620246177 U CN 201620246177U CN 205780366 U CN205780366 U CN 205780366U
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- bearing
- outer ring
- external diameter
- ring
- electric tool
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Abstract
A kind of inclined raceway groove sealed-bearing of electric tool, including outer ring, inner ring, steel ball, nylon cages, with stretching spring oil sealing, described inner ring, the channel center O of outer ring deviate the axial centre O ' of bearing, plural ring groove is had on the external diameter of described bearing outer ring, the most embedding expansion loop matched in described ring groove, the external diameter of described expansion loop contacts with the installation bore installing bearing more than the external diameter of bearing outer ring, described expansion loop, forms contact and seals.Because being provided with two identical structures, the expansion loop of size on the external diameter of bearing, for making up, buffer, reduce bearing in the running because of fricative frictional vibration and noise, the leakage that can stop lubricating oil stops again external dust, impurity to enter lubricating oil, make bearing seal more reliable, thus extend the service life of bearing, it is ensured that the normal use of electric tool.
Description
Technical field
This utility model relates to a kind of sealed-bearing, the inclined raceway groove sealed-bearing of a kind of electric tool.
Background technology
Manufacturing all be unable to do without electric tool, electric tool has become their indispensable instrument, because it has diversified function, especially it lightly can apply to multiple different working environment, and have the advantages that to work in ambulant operation occasion, production for enterprise provides increasing facility, is greatly improved the production efficiency of enterprise and alleviates the labor intensity of workman.
During electric tool work, rotating speed is high, the operating time is long, and for avoiding bearing need to often refuel and exchange trouble and inconvenience that new bearing brings, electric tool is frequently with inclined raceway groove sealed-bearing.
nullElectric tool is typically operated by hand-held，And the operating time is longer，Therefore can be to lightweight、Vibration、Noises etc. propose higher requirement，All need to control within the acceptable range，Therefore，The housing of existing electric tool all uses alloy aluminum，When bearing operates under a load, heating is quickly，Bearing transfers heat to each several part of electric tool at once，Housing is cast by alloy aluminum to produce after being heated and is expanded，The mounting seat hole dimension installing bearing is caused to become big，And bearing、Housing is made by different materials，Its coefficient of expansion is different，Bearing is less than housing，Therefore between bearing outside diameter and installation bore, gap is produced，This gap will cause bearing outside diameter and installs loosening between bore，Even skid，The friction that this skidding will be accelerated between bearing mounting base hole and bearing outside diameter，Rocking according to bearing can be added again because friction increases、Vibration is increased with noise，Increase along with gap，Following one by one it is the leakage of lubricating oil and external dust impurity enters Bearing inner，Add according to the abrasion of bearing，Finally make bearing premature failure.
The patent No. 201120269698.9 " the zanjon sealed-bearing arranged on a kind of electronic component discharge machine " provide only and arranges zanjon sealed-bearing on electronic component discharge.
Number of patent application 201410197702.3 " fan and sealed-bearing thereof ", it is provided that be also sealed-bearing to be socketed in the rotating shaft of fan and is arranged in sleeve.
Summary of the invention
Technical problem to be solved in the utility model is: provide the inclined raceway groove sealed-bearing of a kind of electric tool, its simple in construction, easily make, can thoroughly solve the gap between bearing outside diameter and bearing mounting base hole and abrasion and the problem of premature failure, the sealing making bearing is more reliable, is greatly improved the service life of electric tool.
The technical scheme in the invention for solving the above technical problem is: the inclined raceway groove sealed-bearing of electric tool, including outer ring, inner ring, steel ball, nylon cages, with stretching spring oil sealing, described inner ring, the channel center O of outer ring deviate bearing axial centre O ', plural ring groove is had on the external diameter of described bearing outer ring, the most embedding expansion loop matched in described ring groove, the external diameter of described expansion loop is more than the external diameter of bearing outer ring, described expansion loop contacts with the installation bore installing bearing, forms contact and seals.
Compared with prior art, the utility model has the advantage of: because being provided with two identical structures, the expansion loop of size on the external diameter of bearing, for making up, buffer, reduce bearing in the running because of fricative vibration and noise, the leakage that can stop lubricating oil stops again external dust, impurity to enter lubricating oil, make bearing seal more reliable, thus extend the service life of bearing.
Accompanying drawing explanation
Accompanying drawing, structural representation of the present utility model.
Detailed description of the invention
Below in conjunction with the accompanying drawings embodiment of the present utility model is further described:
By inner ring 5, outer ring 2, steel ball 4, nylon cages 3, the oil sealing 7 of band stretching spring 6 form with the structure of existing inclined raceway groove sealed-bearing, act on and identical not describing in detail.
The position of the axial centre O ' of the channel center O deviation bearing on inner ring 5, outer ring 2, and deviate bearing axial centre O ' position line be OO ' and its equivalently-sized, direction is consistent, oil sealing 7 external diameter is arranged on the rib side that outer ring 2 internal diameter is wide, oil sealing 7 internal diameter is arranged on external diameter wide shelves limit one side contacts of inner ring 5, forming contact sealing state, stretching spring 6 remains and oil seal lip is carried out pretension.
Two ring grooves 8 are had on the external diameter of bearing outer ring.Two identical structures, shape, the expansion loops 1 of size, be tightly embedded in two ring grooves 8 that outer ring 2 external diameter periphery matches.
The external diameter of the expansion loop 1 being fabricated to by elastomeric material is greater than the external diameter of bearing outer ring 2, and described expansion loop contacts tight fit with the installation bore installing bearing, forms contact and seals.
On the position of the upper and lower both sides that ring groove 8 lays respectively at the line segment OO ' that described center O and described center O ' is linked to be, as long as avoiding at inside and outside circle channel location, intensity because of fluted bearing to be weakened, the most also to avoid in bearing both ends of the surface to recessing at angle, other place meeting fluting condition is all right.
During use, this inclined raceway groove sealed-bearing is installed in the bearing mounting base hole of electric tool, form contact to seal, after electric tool work, bearing heating, due to the existence of expansion loop 1 and effect, makes up the gap and friction decreased between bearing and bearing mounting base hole, reduce bearing outer ring slip in bearing mounting base hole, loosen, make the external diameter of bearing outer ring and bearing mounting base hole for moving with the touch sealing, seal more reliable, thus extend the service life of bearing.
Claims (3)
1. the inclined raceway groove sealed-bearing of an electric tool, including outer ring (2), inner ring (5), steel ball (4), nylon cages (3), oil sealing (7) with stretching spring (6), described inner ring (5), the axial centre O ' of the channel center O deviation bearing of outer ring (2), it is characterized in that on the external diameter of described bearing outer ring (2), there is plural ring groove (8), the most embedding expansion loop (1) matched in described ring groove (8), the external diameter of described expansion loop (1) is more than the external diameter of bearing outer ring (2), described expansion loop (1) contacts with the installation bore installing bearing, form contact to seal.
The inclined raceway groove sealed-bearing of electric tool the most according to claim 1, it is characterized in that on the external diameter of described bearing outer ring (2), there are two ring grooves (8), two identical structures, shape, the expansion loops (1) of size are tightly embedded in two ring grooves (8) that outer ring (2) external diameter periphery matches, and described expansion loop (1) contacts tight fit with the installation bore installing bearing, form contact and seal.
The inclined raceway groove sealed-bearing of electric tool the most according to claim 1, it is characterised in that on the position of the upper and lower both sides that described ring groove (8) lays respectively at the line segment OO ' that described center O and described center O ' is linked to be.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620246177.4U CN205780366U (en) | 2016-03-29 | 2016-03-29 | The inclined raceway groove sealed-bearing of electric tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620246177.4U CN205780366U (en) | 2016-03-29 | 2016-03-29 | The inclined raceway groove sealed-bearing of electric tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205780366U true CN205780366U (en) | 2016-12-07 |
Family
ID=57414181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620246177.4U Active CN205780366U (en) | 2016-03-29 | 2016-03-29 | The inclined raceway groove sealed-bearing of electric tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205780366U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111630285A (en) * | 2018-04-11 | 2020-09-04 | 舍弗勒技术股份两合公司 | Sealing device, sealing element and pedal crank device |
-
2016
- 2016-03-29 CN CN201620246177.4U patent/CN205780366U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111630285A (en) * | 2018-04-11 | 2020-09-04 | 舍弗勒技术股份两合公司 | Sealing device, sealing element and pedal crank device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200519 Address after: 242200 Guangde Jianshe Road Economic Development Zone 5, Xuancheng, Anhui Patentee after: GUANGDE ZHONGLONG BEARING Co.,Ltd. Address before: 201400, No. 28 Pu Pu Road, Fengxian District Industrial Development Zone, Shanghai Patentee before: SHANGHAI ZHONGLONG BEARING Co.,Ltd. |
|
| TR01 | Transfer of patent right |