| WO/2010/043016 | QUICK-RELEASE RETAINING BRACKET |
| WO/2011/020414 | SHREDDER USED IN HORTICULTURE |
SASSI KARI (FI)
| US2798748A | 1957-07-09 | |||
| US2888284A | 1959-05-26 | |||
| US3334931A | 1967-08-08 | |||
| US3797950A | 1974-03-19 | |||
| DE2547366B2 | 1979-12-20 | |||
| DE2318796A1 | 1973-10-18 |
| 1. | A friction joint for fi:_ng a first machine element (11 , respectively 21 ) to a second machine clement (12, respectively 22), said friction joint ( 10 , respectively 20) being formed with the aid of at least one sleeve likα member (15. respectively 25a, b) so that said sleevelike. member .(15 > respectively 25a,2 b) has been disposed around said first machine element (11 , respec¬ tively 21 ) , and that said second maciiine element (1 , respectively 22) has been adapted to receive said sleeve—like member (15. respectively 25 *, 2 b), charac¬ terized in that the sleevelike member '.,15. respectively 25a,25b) is tiltable by the aid cf a τilting moans (175 respectively 27) through ar, angle (^*) , hereby the re spe c xvc ly 5a,25b) creates an interlocking with the first ma¬ chine element ( 11 , respectively 21 ) a d similarly the outor surface of the sleevelike member ( 15 > respec¬ tively 25a,25b) creates an interlocking with the second machine element (12, respectively 22). |
| 2. | Friction joint according to claim 1 , characterised in that said tilting means ( 17.* respectively 27) is a ignτcn n scr cisOosc _ι.n a hole (1 *e— spectively 26) provided to pierce the εlcevelike member (15. respectively 25a). |
| 3. | Friction joint according to claim 2, characterized in that the tightening screw (,2~) of one sleeveliko member (25?) has been disposed ro cause simultaneous tilting of both sleevslike members (25?., 25b). h . Friction joint according to any one c: claims 13> characterized in thar in the end faces •f The sleeve— like member ( 5« *espocτively 2255as,,—_5_>b■ rr.nular recesses * c o e n " r o v π π , BAD ORIGINAL 5 Friction joint according' to any one of claims 1 h , characterized in that the first machine element (11) is a shaft and the second machine element (1 ) is a sprock¬ et wheel* provided with hub. |
| 4. | 6 Friction joint according to any one of claims 14, characterized in that the first machine element (21 ) is a shaft and the second machine element (22) is a hubless sprocket wheel. 7« Friction joint according to claim 5 or β, character¬ ized in that the outer diameter (&_ ) of t sleeve ■x, like member (15J respectively 25a,25b) has been ground with the sleevelike member tilted through an angle (θ£) to a dimesnion which is ecual to or larger than the innei diameter (D) of the sprocket wheel (12, respectively 22), and that the outer diameter ( .i^ ) of the sleevelike member (15? respectively 25a,25b) when the sleeve—like member is in nontilted position is inferior by the clearance ( j ) to the inner diameter (D) of the sprocket wheel (12, respectiv.el3r 22), the clearance (—j ) being understood to be that clearance which is ~>τeseτι.i between the sleevelike member and the sprocket wheel when the sleeve—like clement is in a nontilted position. |
| 5. | 8 Fricticn j oint according to claim 5 * TΓ 7. charac¬ terized in that the inner diameter („'„ ) cf the sleeve like member (15J respectively 25s,25b) is ground with the sleevelike member tilted through an angle {06 ) to a dimension which is equal to or smaller than the diame¬ ter (d) of the shaft (11 , respectively (21 ) , and that the inner diameter cf the sleevelike member '«= ) when the sleeve—like member is in non— ilted position exceeds the diameter (d) of the shaft by the clearanre ( __,), the clearance (~i_„) being .tndarstood tc be the cl3arar.ce which is nresent between the sleeve—like member and the shaft when fio sleev?—like member is in a ncn—tilted position. BAD ORIGINAL __O PI. |
The present invention ' concerns a friction joint for fixing' a first machine element to a second machine element, said friction joint being established with the aid of at least one sleeve—like member so that said sleeve-like -member has been disposed _around said first machine element, and that said second machine element lias been disposed to receive said sleeve-like element.
For integral joining be een a shaft and a hub, a key- way and a simple uniform key have long been applied.
As a consequence of better materials and more accurate amifacturing procedures, a friction joint of this type is too ccarso nowadays.
The following characteris ics, among others, are re¬ quired of ideal tightenable joints. The shaft and the central hub hole must be completely cylindrical. The tolerances and surface quality requirements of the force-transmitting joint must be reasonable. The joint must retain the original centering. It must be possible to undo and reestablish the joint several times. Axial displacement of the joint should be easy. Establishing of the joint must not require the use of special tools. The direction of torque {driving vs . driven) must be changeable in the orce-transmitting joint. The fric¬ tion joint should not necessitate the use of securing keys and the like, whereby economy in shaft thickness becomes possible.
The characteristics listed above arc- not achievable with a conventional key joining, and -he key joint iss
■ tisfactorv - rcbism solution
(5
DC O
J O the nur.oos? of es ablishing a friction joint, the
< so-called IT? sleeve has recently be er, developed, bu C Q the aid of which it is p ossible to mount or, shaft
e.g. sprocket wheels, belt pulleys, gear wheels, clutches, cams, flywheels, rolls, levers, cutting disks, etc. A sleeve of this type replaces the problem solutions previously applied, such as keyways , rifliήg,- spbinirg, set screws, welded, cone, tigh' -if'.ing and crimp joints, etc. The ET? sleeve expands against the two surfaces which arc meant to transmit the torque. This expa.ns.ion is achieved by means of a pressure fluid applied between the inner and outer walls of the sleeve. The pressure fluid is acted upon by a pressure ring, which is tightened by means of common hex head screws. Although by this design a number of remarkable advantages are gained, its greatest drawback are its scaling problems. It is also a fact that the ET? sleeve comprises a great number of components and this solu¬ tion is therefore comparatively ccrtpTex.
The object of the invention is to achieve an improve¬ ment of friction joints kno in the art. The more de- tailed 'object of the invention is to provide a friction joint in which the sealing problems have been totally avoided. A further object of the invention is to pro¬ vide a friction joint which is as simple as possible of its construction but which is reliable in operation all the same. The other objects of the invention and the advantages gained with its add will be apparent from the disclosure of the invention.
The objects of the invention are achieved by means of a friction joint mainly characterized in that the sleeve-like member is tiltable , by means of a tilting device, through a certain angle, whereby the inner surface of the sleeve-like member creates an inter¬ locking with the first machine element and, in like manner, the cuter surface of the sleeve—like member creates an interlocking with the second machine eie—
;re characteristic features of the friction
joint of the invention are stated in claims 2 through 8.
The remarkable advantages gained b the friction joint of the invention, compared -w th the ETP sleeve, include the followin . The torque transmitted by the friction joint can be regulated, i-rhereby the friction joint may also be applied as an over-load clutch. It is possible in the friction joint of the invention to make the friction ring, shaft and hub of one and the same materi¬ al, "hereby temperature variations cause no variations of the joining. The space requirement in .ax al direction of the friction joint of the invention is minimal. The friction joint of the invention can be made of any ma- terial whatsoever. The manufacturing and installation of the friction joint of the invention are exceedingly simple and inexpensive.
The invention is described in greater detail with refer- ence being made to certain adΛ-antag ous embodiments of the invention, presented in the figures of the attached drawing, to which embodiments however the invention is not meant to be exclusively confined.
Fig. 1 presents, in section, an advantageous embodiment of the friction joint of the invention, adapted to the mounting of a sprocket wheel with hub on a shaft.
Fig. 2 presents, in section, anoτher advantageous embod- i ent of the friction joint of the invention, adapted to the mounting of a hublcss sprocket wheel on a shaft.
Fig. 3 presents an advantageous embodiment of the fric¬ tion r • iinng; eemmppllooyyeedd ii:n the friction joint o: tion, in frontal vie:
Fig. -:- presents in elevational view, the friction ring cf Fig. 3, tilted through the angle C .
Fig. 5 show's, in section, the frictioi. ring of Fig. h .
In the embodiment of Fig. 1 , the friction joint of the invention in general has been indicated with the refer- ence numeral 10. In this embodiment, the friction joint 10 is employed to mount on the shaft 11 a sprocket wheel 12 with hub. The shaft diameter has been indi¬ cated with .d and the inner diameter of the sprocket wheel, with D. Reference numeral 13 indicates the hub of the sprocket wheel 12.
In accordance with the fundamental idea of the inven¬ tion, the shaft 11 and the hub 13 oi" the sprocket wheel 12 have been fixed to each other by the aid of an annu- lar sleeve-like member 15 so that when the sleeve-like member 15 is tilted through the angle - the inner sur¬ face of the sleeve-like member 15 creates an interlock¬ ing with the shaft 11 and similarly the outer sur ace of the sleeve—like member 15 creates an interlocking with the hub 13 of "tile sprocket wheel 12. To the purpose of. mounting the sleeve—like member 15 on the shaft 11 and within the hub 13 of the sprocket wheel 12, an an¬ nular recess 1 -!• with a size consistent w the inner diameter D of the hub 13 has been made in the hub 13 of the sprocket wheel 12.
In the embodiment of Fig. 1 , the tilting of the sleeve¬ like member 15 has been accomplished with the aid of a tightening screw 17, disposed in a threaded hole 1o provided through the end face of the sleeve-like member 15 * In order to facilitate the insertion of the sleeve- like member 15 » annular recesses IS have been provided in the end faces of the sleeve-like member 15 It should be noted that the sleeve-like member 1 i-= inserted in its place encircling - sha t 11 , in -he annular space
1-4 in non-tilted position, in whic z e sleeve-like member 15 does not fix the shaft 11 to vine hub 1 of the ≤crocket wheel 2. -. . _-. _~.ι-_ • _•».- • ..Λ.
BAD ORIGINAL
In the embodiment of Fig. 2, another advantageous em¬ bodiment of the friction joint of the invention has been generally indicated with the reference numeral 20. ' th the aid of the friction joint 20, the shaft 21 is 5 fixed to the hubless sprocket wheel 22. The diameter of the shaft 21 has been denoted d and the inner diameter of the sprocket wheel 22, with D. In this em¬ bodiment there have- been fitted around the shaft 21 , in the space 2k , two sleeve-like members 25 and 25b. One 10 sleeve-like member 2 has been provided with a threaded hole 26 piercing its end ace , and in this hole a tight¬ ening screw 27 has been placed. Tightening of the screw 27 has the effect that both sleeve-like elements are simultaneously tilted through the angle --> , whereby the
15 inner surfaces of the sleeve-like members 2^ -. and 25b become interlocked with the shaft 21 and similarly their outer sur aces, with the sprocket wheel 22. In order to facilitate the insertion of the sleeve-like members 2 a and 25b, annular recesses 28 have been provided in their
20 end faces.
The outer diameter of the sleeve-like member 15 depicted in Pigs 3-5 j ^ ' 'u^ as b<- -χ\ ground with the_ sleeve-like member 15 tilted through said angle to the respective
25 . dimension £ ' u , which is equal to or larger than the inner diameter D of the sprocket wheel 12, as shown in Fig. . In Fig. -4, the dimension • _ 0 of the sleeve-like member 15 refers to the diameter when the sleeve-like member 15 ' is in non-tilted position, i.e. when the angle 0 y' - is zero. The said dimension & * u is inferior by the clearance to the inner diameter D of the sprocket wheel 12. Thus, the clearance - ' - is understood to be that clearance which is present between the sleeve-like member 15 and the hub 1 of the sprocket wheel when the 5 sleeve-like member is squarely positioned.
As shown in Fig. 5 . " e inner diameter ι- * s of the sleeve-like member 1 --*= understood to be the inner diameter of the sleeve-like member 1 when the sleeve-
like member 15 is tilted throguh the angle < , . The inner diameter of the sleeve-like member 15, ^-* s . ------ grou d to this dimension with the sleeve-like member 15 tilted through the angle ~ . , and the magnitude of this di en- sion φ s is equal to or smaller than the diameter d of the shaft 11. In Tig. 5 j the dimension refers to the inner diameter of the sleeve-like member 15 when the sleeve-like, o ber .15 is squarely positioned, i.e. when the angle *-*' is zero. This diomsnion ψ s e ceeds the shaft diameter d b the clearance . . Thus the clear¬ ance is understood to be the clearance which is pres¬ ent becween the sleeve-like .member 15 and the shaft 11 when the sleeve-like member 15 is squareI3" positioned.
In the foregoing only certain advantageous embodiments of the invention have been presented, and it is obvious to a person skilled in the art that numerous modifica¬ tions thereof can be made within the scope of the inven¬ tive idea presented j.n the claims following below.
BAD ORIGINAL