CN207470718U - A kind of outer ring of four-point contact ball for ball screw nut - Google Patents
A kind of outer ring of four-point contact ball for ball screw nut Download PDFInfo
- Publication number
- CN207470718U CN207470718U CN201721557117.5U CN201721557117U CN207470718U CN 207470718 U CN207470718 U CN 207470718U CN 201721557117 U CN201721557117 U CN 201721557117U CN 207470718 U CN207470718 U CN 207470718U
- Authority
- CN
- China
- Prior art keywords
- outer ring
- ball
- main body
- point contact
- ring main
- 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
Links
- 238000009434 installation Methods 0.000 claims description 7
- 229910001651 emery Inorganic materials 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 238000003754 machining Methods 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000008859 change Effects 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000005461 lubrication Methods 0.000 description 2
- 238000006748 scratching Methods 0.000 description 2
- 230000002393 scratching effect Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
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- Transmission Devices (AREA)
- Rolling Contact Bearings (AREA)
Abstract
A kind of outer ring of four-point contact ball for ball screw nut, including outer ring main body, the excircle of the outer ring main body is arc-shaped, the inner periphery of the outer ring main body is equipped with the left end close to the outer ring main body and the raceway groove for installing the ball of four-point contact ball, circumferential oil groove is equipped at the center of the raceway groove, being located at the both sides of the circumferential oil groove on the raceway groove, respectively for tool there are one contact point contact with the ball of four-point contact ball, the both sides that the circumferential direction oil groove is located on the inner periphery of the outer ring main body are respectively provided with a dustproof groove.The beneficial effects of the utility model are：It is not only simple in structure that compact, machining accuracy consistency is good, high yield rate, and can ensure that conjuncted nut will not be broken with the junction of outer ring, clearance will not be caused to change due to the temperature difference.
Description
Technical field
The utility model is related to technical field of bearings more particularly to a kind of four-point contact balls for ball screw nut
The outer ring held.
Background technology
Ball screw nut transmission mechanism belongs to a kind of most common transmission mechanism of mechanical transmission fields, in ball screw spiral shell
Female transmission mechanism is applied in some fields, such as is applied in automobile steering device, with the ball nut of screw cooperation need with
Bearing is coordinated, therefore installation bearing is needed on ball nut, and bearing is separately manufactured, bearing peace with ball nut
It is that the inner ring of bearing is a tight fit on ball nut during dress, the gear casing of turning machine is connected by the outer ring of gear and bearing
It connects.Although being tight fit between the inner ring and ball nut of bearing, there are still installation error, it is difficult to be adapted to some biographies
In the higher product of dynamic required precision.
Thus in order to avoid installation error and cost savings, current many ball screw nut transmission mechanism manufacturers are just
The inner ring of bearing is molded directly on ball nut, to avoid installation error.By bearing and ball nut be combined as one it is whole
Body both reduces number of components, reduces installation procedure, also improves installation accuracy, but in bearings and ball nut
It is combined as in the technical solution of an entirety, outer ring needs to overcome the amount of deflection torque of entire conjuncted nut in assembling, otherwise exists
The junction of bearing outer ring and conjuncted nut is easy to be broken, service life section, while needs to caused by the external operating mode temperature difference
Adjusting compensating action is played in clearance variation.Furthermore it is combined as in the technical solution of an entirety in bearings and ball nut,
Boundary during the left and right two sections of arc machinings of bearing channel on its bearing outer ring, which is compared, to be difficult to grasp, and is often sent out in process
Life, which is crossed the border, or boundary line is unclear waits quality accidents, and yield rate is relatively low, inefficient.
Invention content
Above-mentioned in order to overcome the shortcomings of to exist in the prior art, the utility model provides a kind of simple and compact for structure, processing
Precision consistency is good, the outer ring of the four-point contact ball for ball screw nut of high yield rate, which can ensure
Conjuncted nut will not be broken with the junction of outer ring, clearance will not be caused to change due to the temperature difference.
The technical scheme in the invention for solving the technical problem is：A kind of four-point contact ball for ball screw nut
The outer ring of bearing, including outer ring main body, the excircle of the outer ring main body is arc-shaped, and is set on the inner periphery of the outer ring main body
There are the left end close to the outer ring main body and the raceway groove for installing the ball of four-point contact ball, set at the center of the raceway groove
There is circumferential oil groove, there are one each tools in both sides that the circumferential oil groove is located on the raceway groove contacts with the ball of four-point contact ball
Contact point, the both sides that the circumferential oil groove is located on the inner periphery of the outer ring main body are respectively provided with a dustproof groove.
Preferably, the both ends of the excircle of the outer ring main body are equipped with external arc chamfering, and the external arc chamfering and institute
The excircle for stating outer ring main body is obtained using integrated emery wheel grinding, not only easy to process, but also external arc chamfering
Setting, can prevent from scratching other parts.
Preferably, the both sides of the raceway groove are equipped with the rib positioned at the inside of the dustproof groove, the rib and the ditch
By Inner arc chamfered transition between road, rounding off between raceway groove and rib, with prevent ball by axial load make by
Wedge angle on rib scratches.
Preferably, the Inner arc chamfering, circumferential oil groove, rib and groove are obtained using integrated grinding, add
Work is convenient.
The beneficial effects of the utility model are：1st, the excircle of outer ring main body uses designed arc-shaped appearance, should in steering
With in operating mode, since the inside and outside circle temperature difference causes bearing working clearance to increase, excircle circular arc can play compensation with automatic aligning
Clearance acts on.2nd, raceway groove is close to the left end of outer ring main body, i.e. raceway groove asymmetry setting, common four-point contact ball design is substantially
Using raceway groove symmetric design, select stress on the right side of the conjuncted close inner ring of ball nut of this common four-point contact ball larger,
It in the case of shock loading, is easily broken, the application keeps left raceway groove design, increases material surplus on the right of raceway groove, resistance to
Impact property obtains bigger raising, and it is long to reduce junction risk of breakage, service life on the right of ball nut.3rd, the ditch of outer ring main body
Circumferential oil groove is set at the center in road, on the one hand circumferential oil groove serves as the line of demarcation for the left and right annular circular arc for forming bearing channel,
On the other hand play the role of oil storage lubrication, solve in the prior art, arc machining wiring is unclear at left and right sides of bearing channel
Chu and easy the technical issues of crossing the border, machining accuracy consistency is good, high yield rate.
Description of the drawings
Fig. 1 is the structure chart of the utility model.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and detailed description.
With reference to Fig. 1, a kind of outer ring of four-point contact ball for ball screw nut is described including outer ring main body 1
The excircle 2 of outer ring main body is arc-shaped, and the excircle 2 of outer ring main body 1 is using designed arc-shaped appearance, in steering application operating mode
In, since the inside and outside circle temperature difference causes bearing working clearance to increase, excircle circular arc can be played compensation clearance and made with automatic aligning
With.
The inner periphery 3 of the outer ring main body 1 is equipped with the left end close to the outer ring main body and for installing four point contacts
The raceway groove 4 of the ball of ball bearing, raceway groove is close to the left end of outer ring main body, the i.e. asymmetric setting of raceway groove 4, common four-point contact ball
Design is held substantially using raceway groove symmetric design, is selected on the right side of the conjuncted close inner ring of ball nut of this common four-point contact ball
Stress is larger, in the case of shock loading, is easily broken, and the application keeps left raceway groove design, increases material on the right of raceway groove
Expect surplus, impact resistance obtains bigger raising, and it is long to reduce junction risk of breakage, service life on the right of ball nut.
Circumferential oil groove 5 is equipped at the center of the raceway groove 4, the both sides that the circumferential oil groove is located on the raceway groove respectively have one
A contact point contacted with the ball of four-point contact ball is located at the circumferential oil groove on the inner periphery 3 of the outer ring main body 1
Both sides be respectively provided with a dustproof groove 6, dustproof groove 6 is for installing dustproof cover.Ring is set at the center of the raceway groove 4 of outer ring main body 1
To oil groove 5, on the one hand circumferential oil groove serves as the line of demarcation for the left and right annular circular arc for forming bearing channel, on the other hand play storage
The effect of oil lubrication solves in the prior art, at left and right sides of bearing channel arc machining wiring do not know and easily cross the border
Technical problem, machining accuracy consistency is good, high yield rate.
Preferably, the both ends of the excircle of the outer ring main body 1 are equipped with external arc chamfering, and the external arc chamfering and institute
The excircle for stating outer ring main body is obtained using integrated emery wheel grinding, not only easy to process, but also external arc chamfering
Setting, can prevent from scratching other parts.
Preferably, the both sides of the raceway groove 4 be equipped with positioned at the dustproof groove inside rib 7, the rib with it is described
By Inner arc chamfered transition between raceway groove, rounding off between raceway groove and rib, to prevent ball from making by axial load
It is scratched by the wedge angle on rib.
Preferably, the Inner arc chamfering, circumferential oil groove 5, rib 7 and groove 4 are obtained using integrated grinding,
It is easy to process.
Claims (4)
1. a kind of outer ring of four-point contact ball for ball screw nut, including outer ring main body, it is characterised in that：It is described
The excircle of outer ring main body is arc-shaped, and the inner periphery of the outer ring main body is used in combination equipped with the left end close to the outer ring main body
Circumferential oil groove is equipped at the raceway groove of the ball of installation four-point contact ball, the center of the raceway groove, is located on the raceway groove described
Respectively there are one the contact point contacted with the ball of four-point contact ball, the inner circles of the outer ring main body for tool for the both sides of circumferential oil groove
The both sides for being located at the circumferential oil groove on week are respectively provided with a dustproof groove.
2. the outer ring of the four-point contact ball according to claim 1 for ball screw nut, it is characterised in that：Institute
The both ends for stating the excircle of outer ring main body are equipped with external arc chamfering, and the excircle of the external arc chamfering and the outer ring main body is adopted
It is obtained with integrated emery wheel grinding.
3. the outer ring of the four-point contact ball according to claim 1 or 2 for ball screw nut, feature exist
In：The both sides of the raceway groove are equipped with the rib positioned at the inside of the dustproof groove, pass through inner circle between the rib and the raceway groove
Arc chamfered transition.
4. the outer ring of the four-point contact ball according to claim 3 for ball screw nut, it is characterised in that：Institute
Inner arc chamfering, circumferential oil groove, rib and groove is stated to obtain using integrated grinding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721557117.5U CN207470718U (en) | 2017-11-21 | 2017-11-21 | A kind of outer ring of four-point contact ball for ball screw nut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721557117.5U CN207470718U (en) | 2017-11-21 | 2017-11-21 | A kind of outer ring of four-point contact ball for ball screw nut |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207470718U true CN207470718U (en) | 2018-06-08 |
Family
ID=62261709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721557117.5U Expired - Fee Related CN207470718U (en) | 2017-11-21 | 2017-11-21 | A kind of outer ring of four-point contact ball for ball screw nut |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207470718U (en) |
-
2017
- 2017-11-21 CN CN201721557117.5U patent/CN207470718U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180608 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |