CN1216626A - Bearing for pinch roller and pinch roller using the bearing - Google Patents
Bearing for pinch roller and pinch roller using the bearing Download PDFInfo
- Publication number
- CN1216626A CN1216626A CN97193971A CN97193971A CN1216626A CN 1216626 A CN1216626 A CN 1216626A CN 97193971 A CN97193971 A CN 97193971A CN 97193971 A CN97193971 A CN 97193971A CN 1216626 A CN1216626 A CN 1216626A
- Authority
- CN
- China
- Prior art keywords
- bearing
- inner core
- urceolus
- pinch wheel
- mentioned
- 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.)
- Pending
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Classifications
-
- 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
- F16C23/00—Bearings for exclusively rotary movement adjustable for aligning or positioning
- F16C23/02—Sliding-contact bearings
- F16C23/04—Sliding-contact bearings self-adjusting
- F16C23/041—Sliding-contact bearings self-adjusting with edge relief
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
- G11B15/26—Driving record carriers by members acting directly or indirectly thereon
- G11B15/28—Driving record carriers by members acting directly or indirectly thereon through rollers driving by frictional contact with the record carrier, e.g. capstan; Multiple arrangements of capstans or drums coupled to means for controlling the speed of the drive; Multiple capstan systems alternately engageable with record carrier to provide reversal
- G11B15/29—Driving record carriers by members acting directly or indirectly thereon through rollers driving by frictional contact with the record carrier, e.g. capstan; Multiple arrangements of capstans or drums coupled to means for controlling the speed of the drive; Multiple capstan systems alternately engageable with record carrier to provide reversal through pinch-rollers or tape rolls
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Support Of The Bearing (AREA)
- Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
Abstract
A pinch roller for use in tape driving apparatuses includes a shaft fixed to a frame, a sleeve having a rubber roller around the outer periphery thereof and a bearing interposed between the shaft and the sleeve. The bearing comprises an inner cylinder and an outer cylinder and a space opening to at least one of the end faces is disposed between the inner cylinder and the outer cylinder. The inner diameter of the inner cylinder is shaped into a taper or arcuate shape which gradually expands from a linear center portion towards both end portions. The inner cylinder and the outer cylinder may be interconnected by an interconnecting rib in a radial direction or by an interconnecting rib in an axial direction. Furthermore, the inner cylinder and the outer cylinder may be interconnected by interconnecting ribs in both radial and axial directions.
Description
Technical field
This invention relates to pinch wheel bearing of using and the pinch wheel that uses this bearing, this pinch wheel is used on the drive in the magnetic recording regenerating unit of video tape recorder and audio cassette sound-track engraving apparatus and can makes at an easy rate, and can carry tape under stable status.
Original technology
In the past, in the drive of magnetic recording regenerating unit, just using pinch wheel.Such pinch wheel requires it to have the performance of transferring the tape that moves under stable status reliably between this pinch wheel and capstan roller axle.In pinch wheel, using bearing so that follow the inclination of capstan roller axle in order to satisfy such performance with automatic aligning effect.The original ball bearing that uses replaces ball bearing to use sliding bearings such as metal bearing and resin bearing in recent years in this bearing.As this bearing, the technical scheme of this bearing of in real fair 8-9447 communique and the flat 7-65443 communique of Te Kai, recording and narrating for example.Though but such bearing can reduce cost, there is the following problem of making on going up and using.
The metal bearing that real fair 8-9447 communique is recorded and narrated is because material is hard, with the problem that the wheel shaft existence is worn or is burnt that pinches of its installation.When axle weares and teares, bearing and the gap that pinches between the wheel shaft strengthen, hinder pinch wheel to rotate sleekly.The micropowder that is produced by wearing and tearing produces bad influence attached to meeting on device and the tape.
The resin bearing that Te Kaiping 7-65443 communique is recorded and narrated, as recording and narrating in the communique, in order to keep the automatic aligning effect, make following shape, the internal diameter of bearing form and axle between leave the gap linearity central portion and from the two ends of above-mentioned central portion to the end face drum type of enlarged diameter at leisure.So, because the both ends of internal diameter have enlarged diameter, the structure of extracting die insert from both sides if the mould that injection molded is used is made the branch pattern can be shaped easily.But in order to guarantee the high precision of resin bearing, the resin bearing make the branch pattern with mould and from the such structure of both sides withdrawing pattern for guaranteeing that dimensional accuracy is that high precision is unfavorable, therefore, the die insert that must be made of one shaping is from the side structure of withdrawing pattern by force.When die insert being implemented by force withdrawing pattern, be animi resin because bearing uses, bearing is produced break and the danger of breach so have.In addition, because resin bearing integral wall is thick, dimensional accuracy (particularly circularity) can degenerate because of the contraction after being shaped.
Though when the resin bearing is contraction after whole material is shaped during by shaping by stock removal, because of cost cost in man-hour rises, and owing to being difficult to a large amount of productions, the cost of product has also improved.
Therefore, the purpose of this invention is to provide the pinch wheel that does not have prior art can prevent axle again with the shortcoming of bearing wearing and tearing and the pinch wheel usefulness bearing of burn and the pinch wheel of this bearing of use.
In addition, the purpose of this invention is to provide and when being shaped, can not break or breach and the pinch wheel that is shaped and is easy to the good bearing of dimensional accuracy and uses above-mentioned bearing.
In addition, the wearing and tearing that the purpose of this invention is to provide pinch wheel are few, can stably transfer the bearing of tape and the pinch wheel of the above-mentioned bearing of use simultaneously.
Description Of The Invention
The present invention is made of axle, sleeve pipe and bearing, and this axle is fixed on pinch wheel on the frame, and the periphery of this sleeve pipe has rubber roll, and bearing is provided between above-mentioned axle and the sleeve pipe.Above-mentioned bearing is made of inner core and urceolus, connects above-mentioned inner core and urceolus by connection rib, is arranged on the space of the end face upper shed of at least one side between above-mentioned inner core and the urceolus.Because elastic reaction is played in this space, when injection molded, even withdrawing pattern can not produce fragmentation or incompleteness yet by force.
In addition, pinch wheel of the present invention is made of inner core and urceolus with bearing, the space between above-mentioned inner core and the urceolus at least to the end face upper shed of a side forming because such space, pinch wheel has elasticity with bearing.And the internal diameter of above-mentioned inner core is made linearity at central portion, makes to radial direction enlarged diameter coniform or circular-arc slowly to both ends of the surface from the central portion of linearity.
Above-mentioned inner core and urceolus are to be connected with the connection rib by the radial direction of an end that is positioned at inner core and urceolus, and mode in the space of other end opening forms.
In addition, above-mentioned inner core is to be connected with the connection rib by the radial direction that is positioned at central portion with urceolus, and above-mentioned space opening is formed on the end faces of both sides of inner core and urceolus.Another kind of inner core is connected by being arranged to the axial connection rib more than 2 with urceolus, and above-mentioned space is to the end faces of both sides opening of inner core and urceolus.
The simple declaration of accompanying drawing
The 1st figure is the oblique view of the pinch wheel of the best of the present invention with bearing, the 2nd figure is the longitudinal section of expression the 1st embodiment, the 3rd figure is the longitudinal section of expression the 2nd embodiment, the 4th figure is the oblique view of the pinch wheel of expression the 3rd embodiment with bearing, the 5th figure is the A-A line cut-open view of the 4th figure, the 6th figure is the B-B line cut-open view of the 4th figure, and the 7th figure is that handle has used the pinch wheel of bearing of the present invention to be installed to the cut-open view that pinches the state on the wheel shaft, and the 8th figure is the cut-open view of the bearing of expression comparative example.
The most preferred embodiment that carries out an invention
In order to illustrate in greater detail the present invention, be described in accordance with the embodiments illustrated below.
The 1st figure and the 2nd figure have represented the 1st embodiment of the bearing of the best of the present invention.Bearing 1 outside of tube 3 within it is provided with axial space 7 and is equipped with urceolus 5, and above-mentioned inner core 3 is connected with the connection rib 9 that urceolus 5 usefulness are established radial direction at one end.Above-mentioned space with the end face opposing end faces upper shed that is provided with connection rib 9, section roughly is the U font.Above-mentioned space 7 becomes big gradually to the end face peristome, therefore easy withdrawing pattern, in addition, the internal diameter of inner core 3 is in order to have the automatic aligning effect, from central portion to both ends of the surface along radial direction enlarged diameter gradually, just, central portion 3a is and pinches and the like that big diameter of certain clearance is arranged between the wheel shaft and form linearity.The internal diameter of inner core, from the two ends of central portion 3a towards the end of inner core 3 3b along radial direction gradually enlarged diameter form coniform or circular-arc.
As mentioned above, form under the coniform or circular-arc situation at the inner face of inner core 3, it becomes big with respect to the inclination that pinches wheel shaft, has the automatic aligning effect.Therefore, pinch wheel can easily be followed the inclination of capstan roller axle and the stable contact condition of maintenance rubber roll.In addition, flexible between inner core 3 and the urceolus 5 owing to be provided with space 7.For this reason, as described above, internal diameter forms in coniform or circular-arc and the injection molded, even extract die insert by force from a side, also can not break or breach.In addition, compare with the situation that the thickness between the external diameter that the space wall thickness is still the internal diameter of inner core 3 and urceolus 5 is not set and integrally forms bearing, owing to space 7 becomes thin-walled, so the minimizing of the drawdown deformation after being shaped can be guaranteed high-precision circularity.In addition, also have elasticity, therefore, in the aligning operation, can not be applied local pressure, prevented to pinch the wearing and tearing of wheel shaft or bearing self by above-mentioned space 7 bearings 1.
The 3rd figure represents the 2nd embodiment of the present invention, in the bearing 10, connects inner core 3 and urceolus 5, the axial space 7a that is provided with in the both ends of the surface upper shed by the connection rib 9a that is positioned at the central portion radial direction.In this wise connection rib 9a is being located under the situation of central portion, can having the elasticity of homogeneous at both ends.For other formation and action effect, owing to identically with the 1st embodiment marking identical symbol, omitting its explanation.
The 4th figure～the 6th figure represents the 3rd embodiment of the present invention, and the structure of bearing 20 is: be provided with axial connection rib 9b to be connected inner core 3 and urceolus 5 on the bearing 1 among the 1st embodiment that represents in the 1st figure and the 2nd figure.Thereby, between inner core 3 and urceolus 5, axially form several spaces 7b.Opening mouthful at the end face of above-mentioned space 7b and connection rib 9 opposite sides, easy for withdrawing pattern, strengthen at leisure towards the width in peristome space.Under the situation that the so axial connection rib 9b of this embodiment is set, the intensity of bearing 20 has improved.Even the quantity of above-mentioned connection rib 9b is not specially limited, preferably connection rib is set as a whole by the interval of equalization.In addition, for other formation and action effect,, omit its explanation owing to marking identical symbol with identical with the 1st embodiment.
Pinch wheel bearing of the present invention is not limited to the foregoing description, can suitably select to connect the quantity of the connection rib of the position of connection rib of radial direction of inner core 3 and urceolus 5 and axial direction.In addition, above-mentioned connection rib, no matter the connection rib of radial direction still is the connection rib of axial direction, have a kind of just passable, be provided with two kinds also passable.The connection rib that omits radial direction only with the connection rib 9b of axial direction connect inner core 3 and urceolus 5 also can, be connected inner core 3 and urceolus 5 is also passable with the combination of connection rib 9a and connection rib 9b.
According to the 7th figure pinch wheel of the present invention is described below.The 7th figure has been to use the pinch wheel of bearing of the present invention to be assembled into the cut-open view that pinches on the wheel shaft.In pinch wheel 21, give the rubber roll 23 that ground outer peripheral face earlier and be installed on the outer peripheral face of sleeve pipe 25 of metal.Bearing 1 is provided in the appropriate location of the inner peripheral surface of this sleeve pipe 25.The wheel shaft 29 that pinches that is fixed on the band ladder on the frame 27 is inserted in the bearing 1, fixing with end cap 30.In the axial direction, putting into plastic packing ring respectively between the end difference of the lower surface of bearing 1 and axle 29 and between the upper surface of bearing 1 and the end cap 30.Between above-mentioned packing ring 31 and axle 29 ladder and end cap 30, be provided with and give selected earlier axial gap.The 7th figure represents to use the situation of bearing shown in Figure 1, no matter is that the bearing of that a kind of embodiment can both use.
The pinch wheel 21 of above-mentioned formation is installed in by frame 27 on the appropriate location of drive of video tape recorder, and rubber roll 23 is set abreast with not shown capstan roller axle.In the use, rubber roll 23 is pressed on the capstan roller axle, transfers the tape that is clipped between the two.Because bearing has the space, and internal diameter towards both ends along radial direction enlarge gradually and form coniform or circular-arc, so have the automatic aligning effect.Therefore, follow the inclination of capstan roller axle easily and guarantee stable conveying tape, simultaneously, do not worry because local pressure etc. causes abrasion.
Indicated as described above, according to pinch wheel bearing of the present invention, connect inner core and urceolus and be arranged at least space owing to become to the end face upper shed of a side, because flexible effect, in being shaped, even, do not worry breaking or producing breach from side withdrawing pattern by force yet.In addition, the contraction after the shaping is few, can keep dimensional accuracy.So just do not worry making the function reduction of pinch wheel, because easy to manufacture, the cost of pinch wheel also can descend simultaneously.In addition, because above-mentioned structure, the wearing and tearing that pinch wheel shaft are few, simultaneously, can stably transfer tape.
Below, be embodiment with the pinch wheel that has used bearing of the present invention, be comparative example with the pinch wheel of the bearing that uses prior art, carry out wearing and tearing (life-span) test of axle respectively.The bearing of the present invention that is used to test is that polyacetal is a resin manufacture, the structure that the 2nd figure represents is as embodiment 1, the structure that the 3rd figure represents is as embodiment 2, the structure that the 4th figure～the 6th figure represents is as embodiment 3, size all is internal diameter 3mm, external diameter 7mm, length 6mm, the height in the space between inner core and the urceolus are 0.9mm.In addition, the bearing of comparative example adopts the metal bearing of structure shown in Figure 8.Use the pinch wheel as a comparative example 1 of the metal bearing that forms drum shape of hole enlargement gradually of the interior radially two ends shown in Fig. 8 (a), the internal diameter that use is represented in Fig. 8 (b) is the pinch wheel as a comparative example 2 of resinous bearing by the polyacetal of straight line, size all is, internal diameter 3mm, external diameter 7mm, length 6mm.
Test method is carried out according to following conditions, and pinch wheel is 1.5kgf to the snap-in force of capstan roller axle, and the rotating speed of capstan roller axle is 1270rpm, approximately is 7 times of revolution of video tape recorder regeneration mode, and sense of rotation reverses every precession in 15 minutes.Test findings is as shown in table 1.Table 1
| Be equivalent to real machine 1000 hours | Be equivalent to real machine 1500 hours | Be equivalent to real machine 3000 hours | |
| Comparative examples A | ????6.5μm | ????8.0μm | ????20.0μm |
| Comparative example B | ????0μm | ????0.5μm | ????1.0 |
| Embodiment | |||
| 1 | ????0μm | ????0μm | ????0μm |
| Embodiment 2 | ????0μm | ????0μm | ???? |
| Embodiment | |||
| 3 | ????0μm | ????0μm | ????0μm |
Show in the above-mentioned table, in comparative example, produced some wearing and tearing, and all can't see wearing and tearing in an embodiment.Do not produce wearing and tearing in an embodiment, be not only, follow the inclination of capstan roller axle easily, and be because be not applied local pressure because bearing is flexible because of the formation that the space is arranged.
Claims (10)
1. a pinch wheel bearing is the bearing that uses on pinch wheel, it is characterized in that, it is made of inner core and urceolus, and the space of face opening at least at one end is set between above-mentioned inner core and urceolus.
2. the pinch wheel bearing described in claim 1 is characterized in that, above-mentioned inner core is connected by the connection rib of radial direction and/or the connection rib of axial direction with urceolus.
3. the pinch wheel bearing described in claim 1 is characterized in that, inner core is connected by the connection rib of radial direction in the end with urceolus, and above-mentioned space is in the other end upper shed.
4. the pinch wheel bearing described in claim 1 is characterized in that, above-mentioned inner core is connected with the connection rib of urceolus by the radial direction that is positioned at central portion, and above-mentioned space is two end face upper sheds.
5. the pinch wheel bearing described in claim 1 is characterized in that, inner core is connected by the axial connection rib more than 2 with urceolus, and above-mentioned space is two end face upper sheds.
6. the pinch wheel bearing described in claim 1 is characterized in that, inner core is connected and is connected by the axial connection rib more than 2 with the connection rib of urceolus by the radial direction that is positioned at the end, and above-mentioned space is in the other end upper shed.
7. as each described pinch wheel bearing in the claim 1 to 6, it is characterized in that the internal diameter of above-mentioned inner core is made linearity at central portion, become to radial direction hole enlargement coniform or circular-arc gradually to both ends from the central portion of linearity.
8. pinch wheel, it is characterized in that, it is made of axle, sleeve pipe and bearing, this axle is fixed on the frame, have rubber roll on the periphery of this sleeve pipe, this bearing is provided between above-mentioned axle and the sleeve pipe, and above-mentioned bearing is made of inner core and urceolus, the space of face upper shed at least at one end is set between above-mentioned inner core and urceolus and has elasticity.
9. the pinch wheel described in claim 8 is characterized in that, the inner core of above-mentioned bearing is connected with the connection rib and/or the axial connection rib of urceolus by radial direction.
10. the pinch wheel described in claim 8 or 9 is characterized in that, the internal diameter of the inner core of above-mentioned bearing is made linearity at central portion, makes to radial direction hole enlargement coniform or circular-arc gradually to both ends from the central portion of linearity.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8351947A JP3070834B2 (en) | 1996-12-11 | 1996-12-11 | Pinch roller |
| JP351947/96 | 1996-12-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1216626A true CN1216626A (en) | 1999-05-12 |
Family
ID=18420722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97193971A Pending CN1216626A (en) | 1996-12-11 | 1997-12-02 | Bearing for pinch roller and pinch roller using the bearing |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP3070834B2 (en) |
| KR (1) | KR19990087821A (en) |
| CN (1) | CN1216626A (en) |
| ID (1) | ID18864A (en) |
| WO (1) | WO1998026414A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101280816B (en) * | 2007-04-07 | 2010-06-02 | 约恩有限公司 | Pivot bearing and an articulated bus |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3063668U (en) | 1999-05-07 | 1999-11-16 | 船井電機株式会社 | Magnetic tape device |
| GB2387474B (en) * | 1999-07-22 | 2003-11-26 | Meiji Gomu Kasei Kk | Pinch roller apparatus |
| WO2001008146A1 (en) * | 1999-07-22 | 2001-02-01 | Kabushiki Kaisha Meiji Gomu Kasei | Pinch roller device |
| JP2010159838A (en) * | 2009-01-09 | 2010-07-22 | Jtekt Corp | Ball spline |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3037036B2 (en) * | 1993-08-23 | 2000-04-24 | 松下電器産業株式会社 | Tape drive |
| JP3168816B2 (en) * | 1994-04-13 | 2001-05-21 | 松下電器産業株式会社 | Pinch roller |
| JP3208987B2 (en) * | 1994-05-11 | 2001-09-17 | 松下電器産業株式会社 | Tape drive |
-
1996
- 1996-12-11 JP JP8351947A patent/JP3070834B2/en not_active Expired - Lifetime
-
1997
- 1997-12-02 KR KR1019980707347A patent/KR19990087821A/en not_active Application Discontinuation
- 1997-12-02 WO PCT/JP1997/004378 patent/WO1998026414A1/en not_active Application Discontinuation
- 1997-12-02 CN CN97193971A patent/CN1216626A/en active Pending
- 1997-12-11 ID IDP973868A patent/ID18864A/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101280816B (en) * | 2007-04-07 | 2010-06-02 | 约恩有限公司 | Pivot bearing and an articulated bus |
Also Published As
| Publication number | Publication date |
|---|---|
| ID18864A (en) | 1998-05-14 |
| KR19990087821A (en) | 1999-12-27 |
| JPH10172202A (en) | 1998-06-26 |
| JP3070834B2 (en) | 2000-07-31 |
| WO1998026414A1 (en) | 1998-06-18 |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |