CN204437065U - Angular contact ball bearing and gear division pneumatic-typed mobile phone - Google Patents
Angular contact ball bearing and gear division pneumatic-typed mobile phone Download PDFInfo
- Publication number
- CN204437065U CN204437065U CN201420621858.5U CN201420621858U CN204437065U CN 204437065 U CN204437065 U CN 204437065U CN 201420621858 U CN201420621858 U CN 201420621858U CN 204437065 U CN204437065 U CN 204437065U
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- China
- Prior art keywords
- inner ring
- outer diameter
- diameter face
- ball bearing
- angular contact
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C1/00—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design
- A61C1/08—Machine parts specially adapted for dentistry
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C1/00—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design
- A61C1/02—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design characterised by the drive of the dental tools
- A61C1/05—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design characterised by the drive of the dental tools with turbine drive
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
- F16C19/16—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls
- F16C19/163—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls with angular contact
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/767—Sealings of ball or roller bearings integral with the race
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/80—Labyrinth sealings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2316/00—Apparatus in health or amusement
- F16C2316/10—Apparatus in health or amusement in medical appliances, e.g. in diagnosis, dentistry, instruments, prostheses, medical imaging appliances
- F16C2316/13—Dental machines
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Mechanical Engineering (AREA)
- Epidemiology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Animal Behavior & Ethology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Dentistry (AREA)
- Rolling Contact Bearings (AREA)
- Sealing Of Bearings (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Abstract
The utility model provides angular contact ball bearing and gear division pneumatic-typed mobile phone, its objective is and can improve the sealability that angular contact ball bearing is applied in the bearing on gear division pneumatic-typed mobile phone.The feature of high performance angular contact ball bearing is, either party of the aperture surface of outer ring and the outer diameter face of inner ring, be provided with the shoulder block portion formed on axial side relative to its roller surface, with the opening shoulder formed on the opposite side of axis, and any the opposing party of the aperture surface of its outer ring and the outer diameter face of inner ring, be provided with the paired shoulder block portion formed on the both sides of the axis of seizing its roller surface on both sides by the arms, outer ring is also provided with and does radial extension from described shoulder block portion towards described inner ring, and be corresponding sealed department with the outer diameter face of inner ring, the outer diameter face of sealing portion and inner ring is formed with the structure of a labyrinth close joint.
Description
Technical field
The utility model is applied in bearing in dentistry pneumatic-typed mobile phone and this gear division pneumatic-typed mobile phone about a kind of, in more detail, be exactly about a kind of form as dental handpiece, the dentistry pneumatic-typed mobile phone ball bearing using pressurized air as its driving source and this dentistry pneumatic-typed mobile phone.
Background technique
As shown in Figure 5, dentistry pneumatic-typed mobile phone 120 substantially by handle part 121 and on this handle part 121 front end set working head 122 form, user just can hold this handle part 121, such as tooth is carried out to the operation of cutting etc.
At present, as the dentistry pneumatic-typed mobile phone 100 forming working head 122, as shown in Figure 6, there is the running shaft 101 that the various dental procedure instruments do not shown in figure can be carried out installing and can be carried out driving to running shaft 101 turbine blade 102 that rotates by pressurized air and a paired ball bearing 103 of swivel bearing can be carried out running shaft 101,104, and these parts be arranged in the bearing support 105 of working head and form.The outer ring 106,107 of this paired ball bearing 103,104 is by being supported by the rubber seal of the annular recessed portion be arranged in bearing support 105 109,110 li.Adopt in the outer ring 107 of the ball bearing 104 of lower side spring ring 111 with to above it in pairs supporting ball bearing 103,104 of setting up produce certain pretightening force.In other words, the ball bearing 103,104 of supporting rotating shaft 101 is formed as aspectant combining form, and by the elastic force of spring ring 111, level pressure pretightening force is applied with to it.(such as, with reference to patent documentation 1).
In addition, as the bearing be used on dentistry pneumatic-typed mobile phone, may also be the angular contact ball bearing being provided with opening shoulder on the shoulder block of inner ring.Furthermore, in order to improve the sealability of its angular contact ball bearing, dust cover can be set on the opening shoulders of inner ring.(such as, with reference to patent documentation 2)
[patent documentation]
The flat 11-37162 publication of [patent documentation 1] Japanese Laid-Open
The flat 08-66411 publication of [patent documentation 2] Japanese Laid-Open.
Model utility content
But, as described in patent documentation 2, dentistry pneumatic-typed mobile phone arranges dust cover, radial clearance is had between dust cover and the periphery of inner ring, be on the one hand dust cover not with inner ring generation rubbing contact, and be necessary for it and be provided with certain gap, but when stopping driving in pneumatic turbine, then due to negative pressure that Bearing inner can produce, different foreign material in external environment condition, it is such as the cutting powder of tooth, the saliva of hospitalier, go in the inside that blood etc. will be inhaled into bearing, even if as best one can by this gap control under minimum scope, also its restriction in the sealing limit can be subject to.
Here, in the utility model 1 technological scheme in, in order to its bearing seal on dentistry pneumatic-typed mobile phone further can be improved, (1) need to provide a kind of angular contact ball bearing, there is the inner ring being provided with inner ring raceway in outer diameter face, aperture surface is provided with the outer ring of outer ring raceway, and between inner ring raceway and outer ring raceway, and maintain certain wrapping angle and carry out multiple balls of assembling, it is characterized in that, either party of the aperture surface of outer ring and the outer diameter face of inner ring, be provided with the shoulder block portion formed on axial side relative to its roller surface, with the opening shoulder formed on the opposite side of axis, and any the opposing party of the aperture surface of its outer ring and the outer diameter face of inner ring, be provided with the paired shoulder block portion formed on the both sides of the axis of this roller surface of clamping, and be also provided with from described shoulder block portion towards the radial extension of described inner ring do further on outer ring, and towards the outer diameter face of inner ring and sealed department corresponding thereto, the outer diameter face of sealing portion and inner ring is formed with the structure of a labyrinth close joint.
(2) be provided in the angular contact ball bearing described in (1), it is characterized in that, the outer diameter face of inner ring is provided with the sealed department of ladder surface, sealing portion is configured with a structure substantially in labyrinth in axis and radial direction.
In 2 technological schemes of the present utility model, a kind of dentistry pneumatic-typed mobile phone is provided, it is characterized in that, this dentistry pneumatic-typed mobile phone by turbine blade, with turbine blade be integrally fixed and at one end go up the running shaft that can install various dental procedure instrument and relative to bearing support running shaft supported and make this running shaft can do freely to rotate one paired rolling bearing formed, the employing of its rolling bearing (1) or the angular contact ball bearing described in (2).
The effect of model utility
In angular contact ball bearing of the present utility model, due to the structure that outer ring and seal arrangement are formed as one, compared with labyrinth stitches with such being only provided with diametrically of current dust cover form, be also provided with labyrinth close joint in the axial direction, so just substantially increase its sealability.In addition, also there is no need as dust cover, must consider the problem on the assembling performance of outer ring, just its degrees of freedom in the sealed department Thickness Design be connected with outer ring is substantially increased, like this, just in order to improve its sealability better, this thickness can be set with greatest limit.Therefore, angular contact ball bearing of the present utility model just can very compatibly be used on dentistry pneumatic-typed mobile phone.
Dentistry pneumatic-typed mobile phone of the present utility model, because have employed the angular contact ball bearing of the integral structure of described dust cover and outer ring, compared with the angular contact ball bearing adopting current dust cover to construct, not only embody its verticity good, also can reduce the mechanical failure brought due to the damage of bearing widely.
Accompanying drawing explanation
Fig. 1 represents the angular contact ball bearing relevant with the 1st mode of execution in the utility model.
Fig. 2 represents the magnified partial view in Fig. 1.
Fig. 3 represents the angular contact ball bearing relevant with the 2nd mode of execution in the utility model.
Fig. 4 represents the magnified partial view in Fig. 3.
Fig. 5 is expressed as the side schematic view of general gear division pneumatic-typed mobile phone.
Fig. 6 represents the sectional view of the key position of current gear division pneumatic-typed mobile phone.。
Embodiment
(the 1st mode of execution)
Below, just with reference to Fig. 1 and Fig. 2, the angular contact ball bearing A of present embodiment is described.Angular contact ball bearing A by outer ring 1, inner ring 2, to be arranged between outer ring 1 and inner ring 2 and free rolling ball 3 can be made and form in order to the retainer 4 carrying out ball 3 suitably keeping, the diameter of the aperture surface of described inner ring is set at 1.5 ~ 5mm, and the diameter of the outer diameter face of described outer ring is set in the specification limit of 4 ~ 10mm.
On the aperture surface of outer ring 1, be formed as the shoulder block portion 13 of raceway relative to this roller surface 12 on the side of axis, the opening that the opposite side of axis is then provided with its outer ring becomes large opening shoulder 14 gradually.In addition, on outer ring 1, be also provided with and do diametrically to extend towards inner ring 2 from this shoulder block portion 13, and towards the outer diameter face of inner ring 2 and the sealed department 15 that (is not in contact with it) corresponding thereto.Then, in the outer diameter face of inner ring 2, roller surface is mixed in centre, and both sides are axially provided with a paired inner ring shoulder block portion 22.
As for the sealed department 15 of outer ring 1, its end and inner ring 2 are formed as a narrower tabular surface accordingly, on inner ring 2, be provided with the cylinder portion 23 corresponding with the end of described sealed department 15, and the end difference 24 that the drop between shoulder block portion 22 and cylinder portion 23 is formed, with this both in axis and radial direction thereof, just define the structure of a labyrinth close joint with the sealed department 15 of outer ring 1.Here, preferably sealed department 15 thickness is in the axial direction set in more than 0.1mm to be advisable, as during for more than 0.1mm, then due to its length than when different foreign material are for invading in Bearing inner the length of passage that must pass through also longer, be difficult to invade so different foreign material just compare.In addition, to sealed department 15 thickness in the axial direction, also need the axial internal clearance considering bearing, for ensureing not interfere to the motion of ball and retainer etc. the restriction it being carried out to certain upper limit specification.
About the radial clearance of labyrinth close joint structure, that is to say, by gap diametrically the front end from sealed department 15 and between the outer diameter face of inner ring 2, be preferably set in below 0.1mm and be advisable.Because when radial clearance is limited at 0.1mm, then the different foreign material coming from Bearing outer just compare and are difficult to invade.On the other hand, the radial clearance of labyrinth close joint structure, that is to say, by the radial clearance formed between the cylinder portion 23 of inner ring 2 and the sealed department 15 of outer ring 1, the specification be preferably set between 0.05mm ~ 0.1mm is advisable.Because when radial clearance is limited at below 0.05mm, then cylinder portion 23 and sealed department 15 will likely come in contact, and the words being limited to more than 0.1mm then can worry that different foreign material invade.
Dentistry pneumatic-typed mobile phone, although do not show in the example shown, but identical with the essential structure at as shown in Figure 5 at present product, have turbine blade, turbine blade is integrally fixed and at one end go up the running shaft that can install dental procedure instrument and relative to running shaft described in bearing block support and the angular contact ball bearing A of enable described running shaft freely rotate one paired present embodiment.
Because of in the angular contact ball bearing A of present embodiment, by the structure of mazy type close joint set radial and axial, so have more the ability of ending different foreign material diametrically than the dust cover of structure at present.Moreover, outer ring and dust cover defined structure integrally owing to adopting again, as long as under the condition do not interfered at retainer, can be designed to thicker by its sealed department 15 thickness in the axial direction as far as possible.So the angular contact ball bearing A of present embodiment just can improve the cutting powder that it stops tooth greatly, and the sealability of the different foreign material of saliva etc.
(the 2nd mode of execution)
Below, just with reference to Fig. 3 and Fig. 4, the angular contact ball bearing A of present embodiment is described.As for being identical part with the 1st mode of execution, omission is done to it here.On the aperture surface of outer ring 1, on the both sides of axis, be formed as a paired shoulder block portion 13 relative to its roller surface.And to have from this shoulder block portion 13 of outer ring 1 and do radial extension towards inner ring 2 further, and form corresponding sealed department 15 with inner ring 2.
In the outer diameter face of inner ring 2, roller surface 21 is mixed in centre, and a side side axially forms inner ring shoulder block portion 22, the opening that the opposing party side of axis is then provided with inner ring becomes large opening shoulder 25 gradually, and is formed with the sealed department 15 of outer ring 1 to corresponding structure in the cylinder portion 23 of opening shoulder 25 front end.
On the sealed department 15 of outer ring 1, its end is then formed as the sealed department inner headed face corresponding with the opening shoulder 25 of inner ring 2, and on the opening shoulder 25 of inner ring 2, be provided with the cylinder portion 23 corresponding with the end of described sealed department 15 and the end difference that drop is formed 24 between opening shoulder 25 and cylinder portion 23.Like this, by the sealed department 15 of outer ring 1 and the outer diameter face of inner ring 2, axis and radial direction just can form the structure that has labyrinth close joint.Preferably sealed department 15 thickness is in the axial direction set in more than 0.1mm to be advisable, can effectively improves its sealability.But, when sealed department 15 thickness is in the axial direction too thick, the phenomenon of can worry ball 3 and retainer 4 generation interference, so, consider its bearing size in the axial direction, for making ball 3 and retainer 4 not interfere, being preferably set limit value thereon and being advisable.
As for labyrinth close joint structure gap diametrically, that is to say, by the radial clearance between the front-end face and inner ring 2 cylinder portion 23 of sealed department 15, be preferably set in below 0.1mm and be advisable.Because when radial clearance is limited at 0.1mm, then the different foreign material coming from Bearing outer just compare and are difficult to invade.And be more preferably set in the specification between 0.05mm ~ 0.1mm and be advisable.Because as radial clearance is set in below 0.05mm time, then cylinder portion 23 just likely can come in contact with sealed department 15, and is set and then can worries that different foreign material invade in the words of more than 0.1mm.
Because of in the angular contact ball bearing A of present embodiment, by the structure of mazy type close joint set in axis and radial direction, so have more the ability of ending different foreign material diametrically than current used dust cover.Moreover, outer ring and dust cover defined structure integrally owing to adopting again, as long as under the condition do not interfered at retainer, can be designed to thicker by its sealed department 15 thickness in the axial direction as far as possible.So the angular contact ball bearing A of present embodiment just can improve the cutting powder that it stops tooth greatly, and the sealability of the different foreign material of saliva etc.
[reference character]
1 outer ring
12 roller surfaces
13 shoulder block portions
14 opening shoulders
15 sealed departments
2 inner rings
21 roller surfaces
22 shoulder block portions
23 cylinder portions
24 end differences
25 opening shoulders.
Claims (3)
1. an angular contact ball bearing, has: the inner ring being provided with inner ring raceway in outer diameter face; Aperture surface is provided with the outer ring of outer ring raceway; And between described inner ring raceway and described outer ring raceway, and certain wrapping angle can be maintained carry out the multiple balls assembled, it is characterized in that,
Either party of the outer diameter face of the aperture surface in described outer ring and described inner ring, is provided with the shoulder block portion formed on the side of axis relative to the roller surface of each raceway and the opening shoulder formed on the opposite side of axis,
Any the opposing party of the outer diameter face of the aperture surface in described outer ring and described inner ring, is provided with the roller surface and form on the both sides of axis one paired shoulder block portion of seizing each raceway on both sides by the arms,
Described outer ring is also provided with further and does radial extension from described shoulder block portion towards described inner ring, and towards the outer diameter face of described inner ring and the sealed department corresponding with the outer diameter face of this inner ring, the outer diameter face of sealing portion and described inner ring is formed with the structure of a labyrinth close joint.
2. angular contact ball bearing as described in claim 1, is characterized in that, the outer diameter face of described inner ring is provided with the sealed department of ladder surface, and in axis and radial direction, is configured with a structure in labyrinth by sealing portion.
3. a gear division pneumatic-typed mobile phone, it is characterized in that, described gear division pneumatic-typed mobile phone by turbine blade, with described turbine blade be integrally fixed and at one end go up the running shaft that can install various dental procedure instrument and relative to bearing support described running shaft supported and enable this running shaft do freely to rotate one paired rolling bearing formed, the angular contact ball bearing of described rolling bearing employing described in claim 1 or claim 2.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013-228233 | 2013-11-01 | ||
| JP2013228233A JP6311273B2 (en) | 2013-11-01 | 2013-11-01 | Angular contact ball bearings and dental air turbines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204437065U true CN204437065U (en) | 2015-07-01 |
Family
ID=52010146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420621858.5U Active CN204437065U (en) | 2013-11-01 | 2014-10-24 | Angular contact ball bearing and gear division pneumatic-typed mobile phone |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6311273B2 (en) |
| CN (1) | CN204437065U (en) |
| DE (1) | DE202014105257U1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210393369A1 (en) * | 2018-11-16 | 2021-12-23 | Dentsply Sirona Inc. | Dental turbine |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111503160B (en) * | 2014-12-25 | 2022-03-15 | 日本精工株式会社 | Rolling bearing for air turbine |
| DE102022200272A1 (en) * | 2021-01-20 | 2022-07-21 | Minebea Mitsumi Inc. | Bearing for a medical or cosmetic instrument |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01223951A (en) * | 1988-03-03 | 1989-09-07 | Koyo Seiko Co Ltd | Dental hand piece |
| DE4423222A1 (en) * | 1994-07-01 | 1996-01-04 | Kaltenbach & Voigt | Medical or dental treatment tool |
| JPH1137162A (en) * | 1997-07-22 | 1999-02-09 | Morita Mfg Co Ltd | Ball bearing for high speed rotation and high speed cutting apparatus for medical application using it |
| US20020168612A1 (en) * | 2000-09-14 | 2002-11-14 | Novak Eugene J. | Bearing for dental handpiece |
| JP2004508132A (en) * | 2000-09-14 | 2004-03-18 | デンツプライ インターナショナル インコーポレーテッド | Improved bearings for dental handpieces |
| JP5234263B2 (en) * | 2008-07-25 | 2013-07-10 | 株式会社ジェイテクト | Tapered roller bearings |
| JP5675263B2 (en) * | 2010-10-19 | 2015-02-25 | Ntn株式会社 | Rolling bearing |
| JP2013019504A (en) * | 2011-07-13 | 2013-01-31 | Jtekt Corp | Rolling bearing |
| DE102011111470B4 (en) * | 2011-08-23 | 2021-04-29 | Minebea Mitsumi Inc. | Covered ball bearing |
| JP6019554B2 (en) * | 2011-09-01 | 2016-11-02 | 日産自動車株式会社 | Wheel bearing |
-
2013
- 2013-11-01 JP JP2013228233A patent/JP6311273B2/en active Active
-
2014
- 2014-10-24 CN CN201420621858.5U patent/CN204437065U/en active Active
- 2014-11-03 DE DE201420105257 patent/DE202014105257U1/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210393369A1 (en) * | 2018-11-16 | 2021-12-23 | Dentsply Sirona Inc. | Dental turbine |
Also Published As
| Publication number | Publication date |
|---|---|
| DE202014105257U1 (en) | 2014-11-13 |
| JP2015086994A (en) | 2015-05-07 |
| JP6311273B2 (en) | 2018-04-18 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |