DOUBLE ACTING CONE COUPLING

Abstract: Cone-coupling for interconnecting a hub (4) and a shaft (5) and comprising an outer cone sleeve (1) and an inner cone sleeve (2) designed for being clamped together by means of screws (3), whereby at least one of the cone sleeves are brought to move in the radial direction for interconnecting the hub (4) and the shaft (5). The radially moving cone sleeve or cone sleeves (1, 2) are formed with several axial slots (16, 17) extending through material of the sleeves, and the said sleeve or sleeves (1, 2) are formed with a weakened deformation portion (18, 19) located axially outside the hub (4) to be connected to the shaft (5) and allowing a radial parallel displacement of the slitted sleeve portions (14, 15).

Description: Double acting cone coupling The present invention relates to a double acting cone coupling for interconnecting a shaft and a hub for locking of the two parts in connection of each other in the axial direction and/or against rotation in relation to each other. Cone couplings for interconnecting a shaft, and a hub are previously known which comprise a double-conical ring on one hand, which is slit up in the axial direction and which contacts the shaft or the hub and two conical sleeves on the other hand each of which contacts a surface portion of the conicla ring and which can be clamped towards each other by means of a screw connection while sliding along the cone surfaces of the conical ring. Such apparatus is shown in the British patent 1,059,451 or the U.S. patent ' 3,043,613. The said previously known apparatus are complicated to manufacture since they comprise at least, three different parts which must be made matching each other, and the coupling must be manufactured with relatively narrow tolerances in order to make an interconnection possible of a shaft and a hub since the cone sleeves cannot to any substantial degree be expanded or contracted respectively in the radial direction. In many cases it ' is considered necessary to lock the cone sleeves, in relation to one of the parts to be interconnected, for instance the hub and to lock the double conical ring in relation to the other part, for instance the shaft. For providing a clamping together of the two cone sleeves in order to get an acceptable inter- connection of the shaft, under the hub, especially for trans¬ mitting torque from one part to the other there is a need for strong axial forces in the said previously known couplings. Often the slit up conical ring can give different centering of the cone sleeves and thereby of the hub part in relation to the shaft part, whereby an imperfect rotation accuracy is obtained. - 3Ϊ J ΪJ- OMPI_ The object of the invention is to avoid the above mentioned disadvantages in the previously known couplings and to provide a cone coupling for interconnecting a shaft and a hub, which coupling is simple and can be manufactured at low costs, which gives a good centering, which comprises only few parts, which can move a substantial distance in the radial direction and therefore must not be manufactured with especially narrow to¬ lerances and which has an inner closed flow of forces when used for interconnecting a shaft and a hub, so that the shaft or the hub need not be utilized for the interconnection of the said two parts, which coupling has small outer dimensions, which can be manufactured in any wanted actual lengths. Further characteristics of the invention will be evident from the following detailed specification in which reference will be made to the accompanying drawings. In the drawings figure 1 diagrammatically shows a double-acting cone coupling according to the invention with the parts thereof separated. Figure 2 is a cross section along line II-TI of figure 1, and figure 3 shows a partial cross section through a shaft and a bub which are interconnected by means of the cone coupling according to figures 1 and 2. Figure 4 shows a modified embodi¬ ment of a coupling according to the invention adapted for con¬ necting a hub to a two-part shaft. Figure 5 shows a partial cross section through a modified coupling according to the in- vention, and figure 6 shows an additional modified embodiment of the invention. Figure 7 diagrammatically and strongly exag¬ geratedly illustrates the function of the coupling. The apparatus illustrated in figures 1-3 generally comp¬ rises an outer cone sleeve 1 and an inner, cone sleeve 2 which are designed for being combined and clamped to each other by means of screws 3» The outer cone sleeve 1 is intended to carry- a hub 4 or a similar means and the inner cone sleeve 2 is adapted to enclose a shaft 5- For this purpose the outer sur¬ face 6 of the outer cone sleeve 1 is formed as a circular cy- linder, and likewise the inner surface 7 of the inner cone OM Λ IP sleeve 2 is formed as a circular cylinder. At one end both the outer cone sleeve 1 and the inner cone sleeve 2 has a radially outwards projecting collar 8 and 9 respectively. The collar 9 has several axial through holes 10 and on corresponding places -> the collar 8 is formed with threaded holes 11 for the screws 3. The outer sleeve 1 has an inner surface 12 which converges in a direction opposite to the collar 8 and the inner sleeve correspondingly has a converging outer surface 13- The outer surface 13 has a slightly larger dimension than the inner sur- 0 face 12 so that the collars 8 and 9 are located somewhat spaced when the sleeves are brought togehter as shown in figure 3- The sleeve portions 14 and 15 projecting from the collars 8 and 9 respectively are formed with several axial through slots 16 and 17 respectively. In the illustrated case there are four slots 5 which are provided diametrically opposed. According to need the sleeves may be formed with a larger or a less number of slots. The two sets of slots 16 and 17 are displaced 45° in relation to each other, so that the slots 17 fall at an even part of the inner surface 12 when the coupling is mounted. 0 Both the outer cone sleeve 1 and the inner cone sleeve 2 is formed with a deformation zone in order to make a radial ex¬ pansion and a radial contraction possible of the sleeve portions 14 and 15 are clamped together thereby interconnecting the hub 4 and the shaft 5- The deformation zone -is located just adja- 5 cent the collar 8 and respectively. Depending on the cone formation the .inner surface 12 and the outer sleeve 1 has its thinnest portion 18 located adjacent the collar 8,* and if the sleeve is formed with relatively thin walls the said thin por¬ tion 18 provides the deformation zone of the outer cone sleeve. 0 The inner cone sleeve 2 on the contrary has a thick portion located adjacent the collar 9 and in order to provide a defor¬ mation zone it is therefore formed with a radial groove 19 at or very closed to the collar 9 thereby providing the intended deformation zone. 5 OMPI /,, IPO mΛ, If the outer cone sleeve 1 is made of a thicker material than the above mentioned one it may be necessary or suitable to provide a radial groove adjacent the collar 8 in order to get a portion which is thin enough to allow the sleeve portion 14 to become expanded. In figure 4 is diagrammatically and strongly exaggerated illustrated how the sleeve portion 14 expands and the sleeve portion 15 contracts by being parallelly displaced when the sleeves are clamped together. The said parallel displacement is made possible by the action of the deformation zones 18 and 19 respectively. The connection of the hub 4 on the shaft 5 is made in that the sleeve 2 is introduced in the sleeve 1 and the screws 3 are pulled slightly. The outer sleeve 1 is introduced in the center hole of the hub 4 and the shaft 5 is introduced in the center hole of the inner sleeve 2. When pulling the screws 3 the sleeve portion 14 of the outer sleeve is pressed radially outwards and the sleeve portion 15 of the inner sleeve is pressed radially inwards so that the hub 14 and the shaft 5 provide a common unit. In figure 4 is shown an alternative embodiment of the in¬ vention in which the sleeves 1' and 2' are provided on opposite sides of the hub 4 and in which the clamping together of the two sleeves is made by means of screws 3' extending through axial bores 20 in the hub 4» In this case both the outer cone sleeve 1 and the inner cone sleeve 2 are formed with radial weakening grooves 18' and 19' and the sleevs are formed with a large number of longitudinal slots 16', 17' • Figure 4 also 7 shows how 2 separate shafts 5' extending on opposite sides of the coupling can be connected to a common hub 4- Figure 5 shows an embodiment of the invention in which a hub 4 is connected to a shaft 5" at the outer end thereof and in which the shaft is formed with a reduced part providing a shoulder 21 which is contacted by the thick end of the inner cone sleeve 2". The outer cone sleeve l" is pressed to the O P IP inner cone sleeve 2" by means of a screw 3 which is threaded into the end of the shaft and which actuates the end of the outer cone sleeve over a washer 22. In this case there is no need for radial collars on the cone sleeves. The annular grooves 18" and 19" may upon need be used for the connection of a puller in case the cone sleeves have wedged up into each other. Figure 6 shows a further alternative embodiment of the invention in which the outer cone l"' is provided directly in the hub 4 and in which the inner cone sleeve 2"' can be clamped to the hub *_. by means of screws 3 which are threaded into the hub. In this case there is only a radial movement inwards of the sleeve portions 15"' of the inner cone sleeve when the sleeve is screwed clamped on the hub 4- It is to be understood that the above specification and the embodiments of the invention illustrated in the drawings are only illuminating examples and that all kinds of different modifications may be presented within the scope of the appended claims. - JREA O PI ι\

Claims: C l a i m s 1. Cone coupling for interconnecting a shaft and a hub and comprising an outer cone sleeve (l) and an inner cone sleeve (2) which are designed for being pulled to each other by means of screws (3) whereby the outer cone sleeve (1) and/or the inner cone sleeve (2) move in the radial direction for connec¬ ting the shaft (5) to the hub (4) > c h a r a c t e r i z e d in that at least one of the sleeves (l, 2) is formed with a cylindrical sleeve portion (14, 15) having several axial through slots (l6, 17) and in that the sleeve or the sleeves are formed with portions (l8, 19) having a reduced thickness at a place actually outside the hub (4) to be connected to the shaft (5)- 2. Cone coupling according to claim 1, c h a r a c¬ t e r i z e d in that it is formed by an outer cone sleeve (1) and an inner cone sleeve (2) having radial collars (8, 9) and in that the outer cone sleeve (l) has an inner surface (12) which converges in a direction opposite to the collar (8) and in that the inner cone sleeve (2) has an outer surface (13) which likewise converges in a direction opposite the collar (9), whereby the outer cone sleeve has a weakened portion adjacent the collar (8) obtained by the convergency of the inner surface (12) whereas the inner cone sleeve is formed with an annular, radial groove (19) adjacent the collar "(9) providing the weakened deformation zone. 3• Cone coupling according to claim 2 c h a r a c¬ t e r i z e d in that both the outer cone sleeve (l) and the inner cone sleeve (2) are formed with at least four op¬ posite axial through slots (16, 17) extending through the sleeve portion (14 > 15) and as far as to the collar (8, 9)« 4. Cone coupling according to claim 1, c h a r a c¬ t e r i z e d in that the outer cone sleeve (1 ' ) and the inner cone sleeve (2") are connected to the hub (4) from oppo¬ site sides thereof and are clamped together by means of through bolts (3") and whereby both the outer cone sleeve (l 1 ) and th e inner cone sleeve (2 1 ) is formed with radial annular grooves (l8-, 19') at or adjacent their collars (8*, 9') providing the weakened.' deformation zones. Cone coupling according to claim 1 adapted to be connected at the end of a shaft (5") havin a reduced portion providing a shoulder (21), c h a r a c t e r i z e d in that the inner cone sleeve (2") contacts the shoulder (21) of the shaft, whereas the outer cone sleeve (1") is formed for being clamped to the inner cone sleeve (2") and the end of the shaft by means of one or several screws (3) which are threaded into the end of the shaft, and whereby both the outer cone sleeve (1") and the inner cone sleeve (2") are formed with radial grooves (l8", 19") providing the weakened deformation zones. 6. Cone coupling according to claim 1, c h a r a c¬ t e r i z e d in that the outer cone sleeve (1"') is provided by a conical bore in the hub (4) and that the inner cone sleeve (2 ,n ) is adapted to be pulled to a hub by means of screws (3) which are threaded into the hub (4). OMPI

Inventors: ADELL L
Applicants: ADELL L, FFV INDUSTRIPRODUKTER AB
Application year: 1979
Main classification: F16D1
IPC codes: F16B3, F16D1