GB2191266A

GB2191266A - Elastic articulated drive shaft

Info

Publication number: GB2191266A
Application number: GB08711512A
Authority: GB
Inventors: Laszlo Tikk; Janos Mohacsi; Tibor Horvath; Laszlo Goher; Gyula Cser; Jozsef Szedlacsek; Tivadar Garamvolgyi
Original assignee: AUTOIPARI KUTATO FEJLESZTOE; Autoipari Kutato es Fejleszto Vallalat
Current assignee: AUTOIPARI KUTATO FEJLESZTOE; Autoipari Kutato es Fejleszto Vallalat
Priority date: 1986-05-20
Filing date: 1987-05-15
Publication date: 1987-12-09
Also published as: DE3715439A1; HUT45591A; GB8711512D0

Description

GB2191266A 1

SPECIFICATION cillations is assured.

In addition to the aforementioned aim we Elastic articulated drive shaft intended to develop a driving shaft which does not require own supporting in bearings The invention relates to an elastic drive shaft 70 on the engine base, the bedding is carried by for the transmission of large driving moments the clutch itself, whereby axial space require (of the order of magnitude of 1000 Nm) with ment between the driven working machine elastic clutches and centralization of the ball- and the driving power machine is inconsidera and socket joint type. One of the most imporble.

tant fields of application is the block-testing 75 Accordingly, our invention relates to an stand for high-output, heavy-category internal elastic articulated driving shaft, having two combustion piston motors. elastically coupled clutches, a shaft intercon As a result of development, the number of necting said clutches, both clutches of the revolutions of internal combustion piston mo- driving shaft have discs extending into one tors and machines with a high torque is show- 80 another and the discs are provided with fron ing an ever increasing tendency in the field of tal claws; onto the lateral surfaces thereof the machine industry, vehicle production and power transmitting bodies made of an elastic working machines, involving increased require- material are bearing up, which are united into ments in respect to the clutch interconnecting one body by means of an internal central ring; the driving power machine and the driving 85 the disc of one of the clutches has a central shaft, respectively. In particular, coupling of an spherical journal, while the disc of the other internal combustion piston engine and a work- clutch has a centralizing sleeve with a spheri ing machine is rather problematic, as the pis- cal nest fitting thereto; the claw clutches are ton motor-due to its restricted balanced sta- interconnected by a shaft consisting of two te-induces oscillation in every mode of oper- 90 halves, permitting a restricted change in ation and it is supported elastically. Self-oscillength, expediently with a connection formed lations of the piston motor appear as a con- of a ribbed journal and ribbed sleeve.

siderable fault in angular displacement at the To facilitate assembly, the disc of one of coupled driving shaft, involving more difficult the clutches has a journal with a cylindrical operative circumstances than usual for the 95 outer surface, on which a ring with an outer clutch. In addition, when the piston motor is spherical surface is fixed and a ring with an allowed to run on a test bench, a clutch is inner spherical surface and an outer cylindrical required, which can be coupled quickly to the surface is fitted thereto, being fixed in the flywheel of the motor. centralizing sleeve of the disc of the other The aim of our invention was to develop a 100clutch by means of a securing ring, while the driving shaft which is well suitable for aforementioned ring with the outer spherical transmitting large moments at a high number surface is fixed through a pressure plate by of revolutions and which is able to overbridge means of the screw arranged in the frontal a considerable angular displacement between bore of its journal.

the coupled machines, with special respect to- 105 The invention will be described in detail by their shafts and the results of uniaxial arrangemeans of a preferred embodiment serving as ment. example, by the aid of the drawings enclosed, From the Patent Specification of the patent wherein

HU-PS 186 991 an elastic clutch is known Figure 1 is the longitudinal sectional view of which is well suitable for transmitting large 110 the driving shaft, moments, and due to its elastic intermediate Figure 2 the front view of the moment piece it enables a considerable angular distransmitting body made of an elastic material placement. The intermediate piece is made of and an elastic material consisting of the internal Figure 3 illustrates the axial section of the ring and of the moment transmitting bodies 115 body according to Fig. 2.

having the shape of a circular arc and a cylin- The articulated driving shaft 1 has two elas der jacket surface, which are arranged be- tic clutches 2, which are interconnected into a tween the half-ciaws of two clutches with driving shaft unit by a splined shaft 3 and a frontal claws. The moment transmitting side- splined sleeve 4. The elastic clutches 2 are surfaces of the claws are also formed as cyl- 120 formed as cluthces with frontal claws. Two inder jacket surfaces. With the embodiment claw discs 5 with the claws 9 pushed into capable of overbridging large angular displace- one another, with the clutch spider 13 ar ments, the surfaces bearing against said cylin- ranged between the claws, form the elastic der jacket surfaces have a barrel-shaped de- clutch 2. For coupling to the driven resp. driv sign. 125 ing machine, the claw disc 5 is provided with Elastic moment transmitting bodies and the a bearing frontal surface 8, threaded bores 6 coupled surfaces can be geometrically central- and a guide flange 7. The guide flange 7 is ized, as neither orientation, nor centralization, formed on the journalled disc 11 fixed with a i.e. bedding of the heavy clutch-halves with shrink-bond in the bore 12 of the claw disc 5.

large diameters and subjected to powerful os- 130The journalled disc 11 has a journal 10, onto 2 GB2191266A 2 which the ring 14 with the outer spherical easily.

surface 33 is pulled-on and fixed through a The journal of the journalled disc can be pressing plate 16 by means of the screw 17 formed directly from the claw disc, so the screwed into the threaded bore 15 of the centralizing sleeve.

journal 10. The surface of the ring 35 having 70 On the frontal surface of the claw discs the shape of a spherical nest 34 is fitting to guide flanges can be formed, which may carry the spherical surface of the ring 14. The ring directly the tubular axis, resp. the ribbed with the spherical nest 34 is fixed in a sleeve.

centralizing sleeve 22, in the bore 32 thereof, Instead of the connection with splined shaft by means of the shoulder 36, the securing 75 and splined sleeve any other shaft connection ring 39-arranged in the circular groove can be applied, which assures a slight axial 38-and the distance ring 37. displacement, at the same time does not ena The outer surface 31 of the centralizing ble the angular displacement between the ele sleeve 22 fits into the bore 12 of the claw ment interconnected.

disc 5 with a shrink-bond. The guide flange 7 80 In the annexed claims reference numbers of the centralizing sleeve 22 serves for orient- have been used purely by way of illustration ing the coupling element. The ball-and-socket and convenience, and not of limitation of joint of the ring 35 with the nest allows a scope.

considerable angular displacement between the

Claims

two claw discs 5 with the claws 9 pushed 85 CLAIMS into one another, forming the clutch 2.

1. A resilient articulated driving shaft as The carrier disc 21 fits to the front surface sembly, comprising two elastic clutches inter 8 of the two inner claw discs 5 of the elastic connected by a shaft, at least one of said clutch 2 resp. to the guide flange 7 with its clutches (2) having connecting elements on front surface 23 and it is fixed with screws 90 both sides, a claw disc (5) with frontal claws led through the bores 24 and screwed into on each said clutch, powertransmitting elastic the threaded bores 6. insert bodies (41) arranged between the claws The tubular axis 19 is fitted to the connect- (9), said bodies being united into one (13) by ing flange 20 of the carrier disc 21 and it is way of a central ring (40) therebetween, one fixed thereon by welding. The end of the tu 95 of the claw discs (5) having a central journal bular axis 19 is formed by the splined shaft 3, (10) with a spherical head (33), while the the splines 18 of which fit into the grooves other claw disc (5) has a centralising sleeve 27 of the bore 26 of the splined sleeve 4, (22) with a spherical seat (34) for co-oper thus permitting an axial displacement. The ation with said head (33), and a shaft (19) for coupling surface 30 of the splined sleeve 4 100 interconnecting the clutches and consisting of fits into the bore 29 of the carrier disc 21. two halves and permitting a restricted relative The impact flange 28 of the splined sleeve 4 axial displacement.

abuts on the coupling flange 20 of the carrier

2. An assembly according to claim 1 disc 21, while they are interconnected by an wherein the connection between the clutches annular weld. 105 is by way of a splined shaft and a splined Fig. 2 illustrates the front view of the clutch sleeve.

spider 13, which is made of a polymerized

3. An assembly as claimed in claim 1 or 2 synthetic material having an elasticity modulus wherein, to facilitate assembly, the disc of of 200 to 1500 kp/CM2, advantageously 700 one of the clutches has a journal with a cylin- kp/CM2. The clutch spider 13 has a circular 110 drical outer surface, on which a ring with an ring 40 on which the insert bodies 41 are outer spherical surface is fixed and a ring with evenly distributed, the barrel-shaped surfaces an inner spherical surface and an outer cylin 42 of which are fitted to the supporting sur- drical surface is fitted thereto, being fixed in faces (with a cylindrical jacket) of the claws 9 the centralizing sleeve of the disc of the outer of the claw discs 5. The radius of curvature 115 clutch by means of a securing ring, while the of said supporting surfaces corresponds to the aforementioned ring with the outer spherical coplanar-radius of curvature of barrel-shaped surface is fixed through a pressure plate by surfaces 42 of the insert body 41. means of the screw arranged in the frontal The circular ring 40 has a narrower top land bore of its journal.

43, which unites the circular ring with the in- 120

4. An assembly according to claim 1 sub sert bodies 41. The width of the insert bodies stantially as herein described with reference to 41 exceeds by 1/4-1/3 the width of the top and as shown in the accompanying drawings.

land 43. This constructive solution, as well as Printed for Her Majesty's Stationery Office the barrel-shaped surface 42 make it possible by Burgess & Son (Abingdon) Ltd, Dd 8991685, 1987.

that the two claw discs 5 can perform a con- Published at The Patent Office. 25 Southampton Buildings, siderable angular displacement, partly deform- London, WC2A 1 AY, from which copies may be obtained.

ing, partly twisting the insert body 41.

The ball-and-socket joint facilitates assembly, spherical nests are formed in ele- ments which can be processed and clamped