CN100517087C - Constant-velocity joint and image-forming device - Google Patents
Constant-velocity joint and image-forming device Download PDFInfo
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- CN100517087C CN100517087C CNB2005101096799A CN200510109679A CN100517087C CN 100517087 C CN100517087 C CN 100517087C CN B2005101096799 A CNB2005101096799 A CN B2005101096799A CN 200510109679 A CN200510109679 A CN 200510109679A CN 100517087 C CN100517087 C CN 100517087C
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- homokinetic joint
- retainer
- photosensitive drums
- synthetic resin
- outer ring
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Abstract
The present invention provides a constant-velocity joint, formed three track grooves circumferentially spaced apart from each other by 120 degrees in the outer wall and the inner wall of the ring shaped space. In the holder assembled in the outer case, the concave part is oppositely set in each track groove, balls are assembled in each groove. The outer ring and the holder are made of forming product of the synthetic resin, but not need grease lubrication. A pair of the protruding parts are set in the opening end of the concave part to prevent the fall of the ball, assembles and decomposes the constant-velocity joint by pulling and inserting the holder in the outer ring oppositely. Thus, it supplies a easily assemble and discomposed, and light quality, restricted constant-velocity joint.
Description
Technical field
The present invention relates to a kind ofly link 2 axles of driving shaft and driven shaft and the transmission of power of driving shaft is given the homokinetic joint and the image processing system of driven shaft.
Background technology
From just known in the past, the homokinetic joint that is delivered to the parts of axletree as the rotary torque with the driving shaft of automobile is arranged.
Above-mentioned homokinetic joint is the parts of keeping the constant speed of driving shaft and driven shaft and allowing the angle correcting of diaxon, therefore, and also being used on the automobile various industrial machineries in addition more.
In homokinetic joint, the fixed type constant velocity shaft coupling that only allows angle correcting is arranged, the sliding-type homokinetic joint that allows angle correcting and allow the direction of principal axis displacement is arranged, as this sliding-type homokinetic joint, the known shaft coupling that patent documentation 1 record is arranged.
In the homokinetic joint of in above-mentioned patent documentation 1, putting down in writing, on the internal axis of outer ring, inner part is set and forms annulus, and at least one side of the outside wall surface of this annulus and internal face, to keep the mode at 120 ° of intervals to be arranged on 3 rail grooves that extend on the direction of principal axis on the Zhou Fangxiang, form recess on the position corresponding of the retainer in being assembled in above-mentioned annulus with above-mentioned rail groove, the ball that assembling can be rolled along described rail groove in each recess, and transmit rotary torque each other in outer ring and retainer by this ball.
In addition, such image processing system has been proposed in patent documentation 2, promptly, the drum axle of photosensitive drums and the turning axle of motor are linked with universal coupling, and with the exposure position of photosensitive drums and manifolding position configuration on 180 ° position, stretching of the image that causes by the rotational speed shakiness of the exposure position on the photosensitive drums and the flexible counteracting photosensitive drums of the locational image of manifolding, thus prevent from duplicating material, to produce stretching of image.
[patent documentation 1] special public clear 52-34699 communique
[patent documentation 2] spy opens flat 5-341589 communique
Yet, in known in the past homokinetic joint,, therefore, need grease lubrication, and, seal the openend of outer ring, thereby prevent the leakage of grease by the cover that the fixing sleeve band is installed because outer ring, inner part, retainer and ball are made of metal respectively.
Thereby, when assembling and decomposition homokinetic joint, cover is installed, thus the operation of the trouble that need take off, need very large labour when existing the damage etc. of the output block that drives to the input side parts of above-mentioned homokinetic joint input power and the output rotation by homokinetic joint to replace.
In addition, in metal homokinetic joint in the past, the intensity height, and Heavy Weight, move loudly, and then have the trouble of grease leakage, so, have problems in the use of business machine, sound machine, medical machine, medical machine, food manufacturing, household electricity goods, limited in the use is in the majority.
On the other hand, in the image processing system of in patent documentation 2, putting down in writing, universal coupling is the universal coupling of variable speed type, therefore, can not the constant speed rotating photosensitive drum, even with the exposure position of photosensitive drums and manifolding position position as 180 °, but because the inclination of assembly error and photosensitive drums, deflection etc. and on 180 ° position, produce deviation, thereby can not offset flexiblely fully, can not form the high image of quality.
In addition, in the universal coupling of variable speed type,, therefore, there is the problem of spended time, maintenance difficult replacing with of parts such as photosensitive drums owing to be not easy to decompose its input side and outgoing side.
Summary of the invention
The 1st problem of the present invention is to provide a kind of homokinetic joint, changes input side parts and outgoing side parts easily, assembling and decompose simple, simultaneously, do not need grease lubrication and in light weight, small-sized, operation sound is little, use restriction few.
In addition, the 2nd problem of the present invention is to provide a kind of image processing system, makes photosensitive drums constant speed rotation always, thereby can form high quality images and maintenance easily.
In order to solve above-mentioned the 1st problem, the homokinetic joint of the 1st invention, adopt the formation of the following stated, that is, constitute by following parts: have an end opening annulus and at least one side of the outside wall surface of this annulus and internal face be formed with 3 rail grooves that on Zhou Fangxiang, separate 120 ° of intervals and axially extend the outer ring, be assembled in the described annular space shape of this outer ring and corresponding respectively to and forms the retainer of recess on the position of described rail groove and be assembled in each recess of this retainer and can be along the ball of described rail groove rolling; Open end at the internal side diameter of the outside diameter of the retainer of each recess of described retainer and retainer is provided with the anti-shedding mechanism that prevents that ball from coming off.
As described anti-shedding mechanism, can adopt the structure that constitutes by a plurality of teats that on the inner peripheral surface of the open end of recess, on Zhou Fangxiang, keep forming at interval.
In described homokinetic joint, if the taper surface that the openend of the outside wall surface of annulus and internal face is formed larger diameter end is set at the open end of described each rail groove, in the time of then in the annulus that retainer is assembled in the outer ring, ball is guided by taper surface, make under this state that is directed that the outer ring is relative with retainer to rotate, at this moment, ball is the injection groove, also can easily assemble homokinetic joint thereby have mutually at ball and rail groove under the situation of phase deviation.
In addition, in described homokinetic joint,, can homokinetic joint be lubricated, can reduce and move sound and lightweight when moment of torsion transmits by the formed products of outer ring by synthetic resin constituted.
In this case, by retainer also is made of the formed products of synthetic resin, the operation sound in the time of can further reducing the moment of torsion transmission, and make the further lightweight of homokinetic joint.
Under the situation that retainer is made of the formed products of synthetic resin, because described teat undercut when being shaped, if so the outstanding length of this teat be required more than, then after shaping, from mould, there is the danger that can damage teat during the demoulding, in addition, if too short, as then to exist club to come off danger.Thereby, preferably the inscribed circle diameter of teat is located at 70～99% scope of sphere diameter.
In addition, in the homokinetic joint of the 1st invention, by with synthetic resin as synthetic resin that can injection moulding, outer ring and retainer can easily be shaped.In addition,, can further improve the lubricity of ball rolling surface, so can access the little homokinetic joint of operation sound by adopting the lubricity resin.
In addition, in order to solve the 2nd problem, the 2nd invention, image processing system is made of following parts: photosensitive drums, to this photosensitive drums be rotated driving driving mechanism, supply with toner and form the developing mechanism of toner picture and duplicate duplicating mechanism on the material at the exposure mechanism that forms the electrostatic latent image picture on the described photosensitive drums, electrostatic latent image on described photosensitive drums with described toner being looked like be replicated in what the speed identical with the circumferential speed of photosensitive drums was carried; The drum axle of described photosensitive drums and the driving shaft of driving mechanism are linked with shaft adapter; Described shaft adapter is to be made of the described the 1st homokinetic joint of inventing.
(invention effect)
As the 1st invention, prevent the anti-shedding mechanism that ball comes off by open end setting at the recess that is formed at retainer, can extract under the state of retainer, prevent that ball from coming off, can the utmost point assemble simply and decompose homokinetic joint.
In addition; by the formed products of outer ring by synthetic resin constituted; can not need grease lubrication, so can not needed to prevent the countermeasure of grease leakage and when transmitting moment of torsion, move the homokinetic joint that sound is little and the moment of torsion transmission loss is minimum with light weight by protective cover is installed.
Thereby, unrestricted in the use, can use on each machine of the business machine that is difficult to so far use, sound machine, medical machine, domestic electric appliances product etc., can improve the design freedom of these machines, thereby can realize miniaturization, cost degradation.
As the 2nd invention, by the drum axle of photosensitive drums and the driving shaft of driving mechanism are linked by homokinetic joint, even the core of the drum axle of the driving shaft of above-mentioned driving mechanism and photosensitive drums depart from mutually or situation about tilting under, also can not make the phenomenon of photosensitive drums generation speed shakiness, and can the constant speed rotation.
Thereby, can prevent the electrostatic latent image that forms by exposure mechanism produce flexible or the toner on photosensitive drums look like to be copied to produce on the image when duplicating on the material flexible, thereby can form the image of very high quality.
In addition, homokinetic joint, as mentioned above, can assemble simply or decompose,, can access maintenance and be easy to image processing system so can change the parts of photosensitive drums etc. easily, simultaneously, do not need grease lubrication, so can accomplish not take place to duplicate the improper situation that material pollutes because of grease leaks.
Description of drawings
Fig. 1 is the longitudinal diagram of the embodiment of expression homokinetic joint of the present invention.
Fig. 2 is the sectional view along the II-II line of Fig. 1.
Fig. 3 is the sectional view along the III-III line of Fig. 1.
Fig. 4 is other the sectional view of embodiment of expression homokinetic joint of the present invention.
Fig. 5 is the skeleton diagram of the embodiment of expression image processing system of the present invention.
Fig. 6 is the figure of the partly cut-away of the photosensitive drums drive division shown in the presentation graphs 5.
Among the figure, 1-outer ring, 5-annulus, 6, the 7-rail groove, the 10-retainer, 12-recess, 13-anti-shedding mechanism, the 14-teat, 15, the 16-taper surface, the 20-ball, the 31-photosensitive drums, 31a-drum axle, 32-CD-ROM drive motor (driving mechanism), 32a-turning axle (driving shaft), the charged device of 33-, 34-exposure mechanism, 35-developer (developing mechanism), 36-dubs electrical equipment (duplicating mechanism), J-homokinetic joint.
Embodiment
Below, with reference to the accompanying drawings embodiments of the invention are described.Fig. 1 and Fig. 2 represent the embodiment of homokinetic joint of the present invention.As shown in the figure, homokinetic joint is made of outer ring, retainer 10 and ball 20.
Also have, in an embodiment,, also can rail groove be set a side of above-mentioned outside wall surface and internal face though on the outside wall surface of annulus 5 and internal face, be formed with rail groove 6,7 respectively.
In addition, on retainer 10,3 rail grooves 6,7 of corresponding respectively outer ring 1 and be formed with recess 12, the described ball 20 of assembling in each recess 12.Ball 20 is made as respectively along each rail groove 6,7 and freely rolls.
As shown in Figures 1 and 2, at the retainer outside diameter of each recess 12 and the open end of retainer internal side diameter, be provided with the anti-shedding mechanism 13 that prevents that ball 20 from coming off.
Can in the resin of injection moulding crystalline resins, noncrystalline resin arranged, can use any one resin, but, under the situation of the torsional interaction more than the amount that allows, can sharply produce and destroy, the therefore preferred crystalline resins that uses because the toughness of noncrystalline resin is low.
As preferred synthetic resin, can be the high synthetic resin of lubricity, for example can enumerate the fluororesin that polyacetal resin (POM), nylon resin, PFA or FEP, ETFE etc. can injection mouldings, polyimide resin, polyphenylens sulfide resin (PPS), Wholly aromatic polyester resin, polyether-ether-ketone resin (PEEK), polyamide-imide resin etc. that can injection moulding.
These resins can use separately, also can use and mix the above polymer alloy of 2 kinds.Or use has cooperated the polymer alloy of above-mentioned synthetic resin in the low synthetic resin of the lubricating property except above-mentioned.
In addition, even under the situation of the low synthetic resin of lubricating property, also can improve lubricating property and use by interpolation kollag or lubricating oil.As kollag, that can enumerate has, for example, and teflon, graphite, molybdenum disulfide etc.
In addition, also can in synthetic resin, add fiber, carbon fiber, various mineral fibres (whiskers) and improve intensity, also can share with kollag etc.
Optimal in the present invention materials used is POM, nylon resin, PPS, PEEK.Nylon resin can be to have in the semi-aromatic nylon etc. of aromatic rings any one in nylon 6, nylon 66, NYLON610, nylon 612, nylon 11, nylon 12, nylon 46, the strand.POM, nylon resin, PPS have superior thermotolerance, lubricity, and price comparison is cheap, therefore, can access the high homokinetic joint of performance price ratio.In addition, even, therefore, can access H.D homokinetic joint because PEEK does not add the enhancing material or lubricant also has superior mechanical strength or lubricity.
As mentioned above,, light weight and the little homokinetic joint of operation sound when transmitting moment of torsion can be accessed, simultaneously, grease lubrication can be do not needed by outer ring 1 and retainer 10 formed products by synthetic resin is constituted.
Thereby, limited few in the use, can use on the various machines of food manufacturing machine etc.
In addition, if outer ring 1 and retainer 10 are formed by oil-impregnated sintered metal, even metallic does not then need grease or protective cover, so do not have obstacle replacing with of homokinetic joint parts yet.
In that homokinetic joint is used under the situation of medical machinery or food manufacturing machine, ball 20 is made of stainless steel or pottery, and removes the influence of environment, so preferred to it.In addition, owing to give the sensation of a kind of health of people, therefore, synthetic resin preferably uses white group.If be POM, then, can not use grease, so the most suitable owing to be white group lubricity height simultaneously.
The teat 14 of anti-shedding mechanism 13, under situation about forming by synthetic resin that can injection moulding retainer 10, undercut can take place when retainer 10 is shaped, therefore, if the radical length of the recess of teat 14 is more than the required length, then after shaping during the demoulding teat 14 can be damaged, in addition, if too short, can not prevent that then ball 20 from coming off.
Thereby, teat 14, the diameter d of its inscribed circle is 70～99% the scope of bulb diameter (bulb diameter) D of ball 20.
Also have, the quantity of teat 14 can be any, also can be ring-shaped continuous on Zhou Fangxiang.In addition, anti-shedding mechanism 13 is not limited to teat 14.For example, also can install and fix ring or O type ring at the open end of recess 12.Perhaps also can cooperating recesses 12 and make and form porose cover and cover on the retainer 10.
As mentioned above, anti-shedding mechanism 13 is set on recess 12, and outer ring 1 and retainer 10 formed products by synthetic resin constituted, thereby do not need grease lubrication, thus, by extracting and inserting in the annulus 5 of retainer 10 relative outer rings 1, can assemble and decompose homokinetic joint, simultaneously, can prevent that ball 20 comes off when decomposing.
Thereby, can access the homokinetic joint of easy assembling and decomposition, can easily change and impaired power is input to the outgoing side parts that the input side parts of above-mentioned homokinetic joint or the output by homokinetic joint are driven in rotation.
At this, as Fig. 1 and shown in Figure 3, if be that it is the taper surface 15 of larger diameter end that rail groove 6 that forms on the inner peripheral surface of cupule 2 and the open end setting that forms rail groove 7 on the outer peripheral face of leading axle 4 make the outside wall surface of annulus 5 and the openend of internal face, 16, when then in cupule 2, assembling retainer 10, ball 20 is by taper surface 15,16 guiding, and by under this boot state, making outer ring 1 carry out relative the rotation with retainer 10, thus, ball 20 injects rail groove 6, in 7, thereby, even at rail groove 6,7 and ball 20 produce under the state of mutual alignment deviations, also can easily assemble homokinetic joint.
At this, taper surface 15,16 also can be the taper surface that has the axle center on the central shaft of outer ring 1 as shown in Figure 3, perhaps also can be the taper surface that has the axle center as illustrated in fig. 4 on the pitch circle of ball 20.
As shown in Figure 3, on the central shaft of outer ring 1, form taper surface 15,16, between the taper surface 15,16 of adjacency, form small guiding teat 17, thus, do not consider that directivity just can assemble homokinetic joint with axle center.
In an embodiment, though it is retainer 10 and the 2nd 11 is integrally formed by synthetic resin, but also the 2nd 11 metal by pottery or iron and steel, stainless steel, aluminium alloy etc. can be formed, and by combining mechanisms such as bolts, combine with retainer 10 by forming synthetic resin.
Also have, the 2nd 11 than the long situation of the whole length of homokinetic joint under owing to prevent loss of machine of torque, therefore, preferably the 2nd 11 is formed by pottery or metal.
In an embodiment, can give ball 20 pressure in advance by the elastic force of outer ring 1.Specifically, be slightly littler than the outside dimension of ball 20 by the internal diameter between the rail groove 7 of the rail groove 6 of cupule 2 and leading axle 4 is made as, can give ball 20 pressure in advance.Its result can eliminate homokinetic joint rocking on direction of principal axis, can improve constant speed.Such method so becomes possibility because outer ring 1 is formed by synthetic resin.
Fig. 5 and Fig. 6 represent that this inventive images forms the embodiment of device.Fig. 5 represents monochromatic image processing system.This image processing system has photosensitive drums 31.Photosensitive drums 31 is rotated by the direction of arrow of CD-ROM drive motor 32 in Fig. 5 as driving mechanism as shown in Figure 6, around photosensitive drums 31, charged device 33, exposure mechanism 34 are arranged, as the developer 35 of developing mechanism, be provided with in order as the dubs electrical equipment 36 of manifolding mechanism and clearer 37 sense of rotation with photosensitive drums 31.
The image processing system that constitutes by above-mentioned part, when photosensitive drums 31 rotations, after making the whole periphery of photosensitive drums 31 all charged by charged device 33, by exposure mechanism 34 according to image information exposure image light, thereby formation electrostatic latent image, supply with toner and form the toner picture to this electrostatic latent image from developer 35, this toner is looked like to be replicated in duplicating on the material A that the speed identical with the peripheral speed of photosensitive drums 31 is transferred, thereby form image duplicating on the material A by dubs electrical equipment 36.In addition, after duplicating, remove the remaining toner on the side face that remains in photosensitive drums 31 by clearer 37.
As shown in Figure 6, photosensitive drums 31 has photosensitive drum shaft 31a at two ends, this photosensitive drums 31a is situated between and is supported on a pair of side frame 38 with free rotation mode by bearing 39, on the other hand, the CD-ROM drive motor 32 that is used to drive photosensitive drums 31 rotations is installed on the housing 40 and is configured in photosensitive drums 31 at direction of principal axis by subtend.
As the turning axle 32a of the driving shaft of CD-ROM drive motor 32 and the drum axle 31a of photosensitive drums 31, being situated between is linked by homokinetic joint J.
As homokinetic joint J, use Fig. 1 to homokinetic joint shown in Figure 3, but also can use homokinetic joint as shown in Figure 4.
As shown in the Examples, by the drum axle 31a of photosensitive drums 31 and the turning axle 32a of CD-ROM drive motor 32 are linked by homokinetic joint J, depart from or tilt even produce core mutually, the shakiness on also can generation speed and can constant speed rotating photosensitive drum 31 at the turning axle 32a of the turning axle 32a of the drum axle 31a of photosensitive drums 31 and CD-ROM drive motor 32.Thereby, can prevent to produce flexiblely on the electrostatic latent image on the photosensitive drums 31 owing to exposure mechanism 34 is formed on, or the toner picture on photosensitive drums 31 produces flexible on image when duplicating by dubs electrical equipment 36.
Thereby, when can form high quality images, need not exposure mechanism 34 and dubs electrical equipment 36 are arranged on 180 ° the position.
In addition, by the outer ring 11 of homokinetic joint J and retainer 21 formed products by synthetic resin is formed, can not need grease lubrication.Thereby, can not take place to pollute the improper situation of duplicating material A owing to grease disperses.
And then therefore homokinetic joint J, can easily change the parts of photosensitive drums 31 grades owing to can extract and insert and can decompose simply and assemble, and can access the image processing system of easy maintenance.
In Fig. 5, the image processing system of monochrome is illustrated for example, but under the situation that forms the coloured image device, prepare 4 groups of image processing systems as shown in Figure 5, with on the throughput direction that duplicates material A, the contact ground connection configuration of these 4 groups of image processing systems, and forms the toner picture by the toner of 4 looks of yellow, fuchsin, cyan and black by these image processing systems, these toners are looked like to overlap duplicate formation coloured image on the material A.
Claims (9)
1. a homokinetic joint (J) is characterized in that, is made of following parts:
Have an end opening annulus (5) and at least one side of the outside wall surface of this annulus (5) and internal face be formed with 3 rail grooves (6,7) that on Zhou Fangxiang, separate 120 ° of intervals and axially extend outer ring (1),
Be assembled in the described annulus (5) of this outer ring (1) and on the position that corresponds respectively to described rail groove (6,7), form recess (12) retainer (10) and
The ball (20) that is assembled in each recess (12) of this retainer (10) and can rolls along described rail groove (6,7);
Open end at the internal side diameter of the outside diameter of the retainer of each recess (12) of described retainer (10) and retainer is provided with the anti-shedding mechanism (13) that prevents that ball (20) from coming off.
2. homokinetic joint according to claim 1 is characterized in that, described anti-shedding mechanism (13) is gone up a plurality of teats (14) that keep forming at interval by the Zhou Fangxiang at recess (12) and constituted.
3. homokinetic joint according to claim 1 and 2 is characterized in that, the open end in described each rail groove (6,7) is provided with the taper surface (15,16) that the openend of the outside wall surface of annulus (5) and internal face is formed larger diameter end.
4. according to any described homokinetic joint in the claim 1 to 3, it is characterized in that described outer ring (1) is made of the formed products of synthetic resin.
5. according to any described homokinetic joint in the claim 1 to 4, it is characterized in that described retainer (10) is made of the formed products of synthetic resin.
6. according to claim 4 or 5 described homokinetic joints, it is characterized in that described synthetic resin is made of synthetic resin that can injection moulding.
7. according to any described homokinetic joint in the claim 4 to 6, it is characterized in that described synthetic resin is the lubricity resin.
8. according to any described homokinetic joint in the claim 5 to 7, it is characterized in that, the inscribed circle diameter of described teat (14) is made as 70～99% of ball (20) diameter.
9. image processing system is made of following parts:
Photosensitive drums (31),
To this photosensitive drums (31) be rotated driving driving mechanism (32),
Described photosensitive drums (31) go up to form the electrostatic latent image picture exposure mechanism (34),
Electrostatic latent image on described photosensitive drums (31) supply with toner and form the toner picture developing mechanism (35) and
Described toner looked like to be replicated in what the speed identical with the circumferential speed of photosensitive drums (31) was carried duplicate duplicating mechanism (36) on the material;
The drum axle (31a) of described photosensitive drums (31) and the driving shaft (32a) of driving mechanism (32) are linked with shaft adapter, it is characterized in that,
Described shaft adapter is to be made of any described homokinetic joint (J) in the claim 1 to 8.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004275746 | 2004-09-22 | ||
| JP2004275764 | 2004-09-22 | ||
| JP2004275746 | 2004-09-22 | ||
| JP2005203408 | 2005-07-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1752856A CN1752856A (en) | 2006-03-29 |
| CN100517087C true CN100517087C (en) | 2009-07-22 |
Family
ID=36679752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101096799A Expired - Fee Related CN100517087C (en) | 2004-09-22 | 2005-09-19 | Constant-velocity joint and image-forming device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100517087C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6187551B2 (en) * | 2015-08-28 | 2017-08-30 | コニカミノルタ株式会社 | Image forming apparatus |
-
2005
- 2005-09-19 CN CNB2005101096799A patent/CN100517087C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1752856A (en) | 2006-03-29 |
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