EP1088174A1 - Gelenkkupplung - Google Patents
GelenkkupplungInfo
- Publication number
- EP1088174A1 EP1088174A1 EP99939332A EP99939332A EP1088174A1 EP 1088174 A1 EP1088174 A1 EP 1088174A1 EP 99939332 A EP99939332 A EP 99939332A EP 99939332 A EP99939332 A EP 99939332A EP 1088174 A1 EP1088174 A1 EP 1088174A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- head
- articulated
- coupling according
- articulated coupling
- shaft
- 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.)
- Withdrawn
Links
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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
- F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
Definitions
- the invention relates to an articulated coupling for transmitting torques between aligned or crossing shafts, in particular for drive shafts of motor vehicles, with an articulated cup into which an articulated head is immersed in an axially displaceable and pivotable manner.
- articulated couplings are known in which a roller bearing is used as the transmission element, which takes over the function of pivoting the shafts relative to one another and at the same time transmitting the torque.
- a bearing ring is attached to the shaft, in which spherical receptacles for balls are incorporated. Almost half of the balls in the recordings protrude beyond the bearing ring and are held in through holes in a spherical ball cage. The balls protrude through the through holes and, with the protruding part, lie them in correspondingly adapted grooves of a joint head in order to enable torque transmission.
- the outer spherical part of the ball cage slides in a corresponding recess in the joint head.
- the articulated cup is drilled out to a large depth to accommodate a supply of lubricant.
- the area between the articulated cup and the articulated head a bellows arranged.
- the many interacting parts of the articulated coupling require a high degree of accuracy in the manufacture of the individual parts, since the manufacturing tolerances add up. On the one hand, this results in expensive production of the individual parts and, on the other hand, in an inexpensive assembly effort for the articulated coupling.
- the invention is therefore based on the object of providing an articulated coupling of the type mentioned at the outset which is inexpensive to produce and simple to assemble.
- the articulated cup is provided with a polygonal bore aligned coaxially to the pot shaft, and the articulated head has a rotary cross-section which is coaxial with the headed shaft and which is adapted to the polygonal bore in radial direction, the rotary cross-section tapering in the axial direction.
- the polygonal bore of the joint pot and the rotary cross section of the joint head have the shape of an equilateral hexagon.
- Such a hexagon is easy to manufacture both in the inner shape and in the outer shape. Large areas can be made available for the transmission of the torque.
- the rotary cross section is in its Largest radial extent is slightly smaller than the polygonal bore in the articulated cup and has a circumferential swivel radius in this area, which is followed by a swivel ball tangential to the free end of the joint head and a taper in the direction of the head shaft up to at least the diameter of the head shaft.
- a ball socket adapted to the swivel ball is expediently incorporated into the joint pot as the end of the polygonal bore.
- the joint head is supported in the ball socket.
- the surfaces of the polygonal bore have a shape that overlaps the sliding radii incorporated in the corners of the polygonal bore, the surfaces of the joint head being adapted to this shape.
- this results in noise reduction when changing the direction of rotation and, on the other hand, generates a larger transmission surface or transmission line, as a result of which the surface pressure is reduced.
- the surfaces of the polygonal bore have a shape which subjects the sliding radii incorporated in the corners of the polygonal bore, the surfaces of the joint head being adapted to this shape.
- the head shaft and / or the joint head and / or the cup shaft are preferably hollow.
- the joint head expediently has slots in the area of the corners between the surfaces or in the radii present there.
- the joint head can thus be made slightly larger.
- the surfaces are covered in elastic rich on the opposite sides, which means that there is practically no more play between the joint head and the joint pot.
- a relatively large elastic range is obtained if, according to an advantageous embodiment, the slots in the joint head extend to the free end of the joint head.
- the surface pressure is relatively low, which prevents selective overloading.
- a spreader exposing the surfaces of the joint head in the direction of the surfaces of the polygonal bore is expediently used at least partially in the longitudinal axis of the joint head.
- the surfaces of the joint head are pressed uniformly against the surfaces of the joint head via the spreader, the spreading of the joint head being required only in a small area.
- the spreader is preferably a ball which rests on the inner spreading surfaces of the joint head under the action of a pressure tappet guided through the hollow head shaft.
- the ball automatically finds the ideal geometrical location for even pressure.
- the pressure tappet actuating the ball is inserted into the head shaft in a pressurized manner.
- the compression spring loading creates a uniform surface pressure between the surfaces of the joint head and the Flats of the polygonal bore safely during the life of the articulated coupling.
- the compression spring is pretensioned with one end on the associated end face of the pressure ram and the other end on a threaded pin screwed into the head shaft.
- the spreader is a ball, which rests against the inner spreading surfaces of the joint head under the action of a pulling shock guided through the hollow pot shaft.
- the tension rod is expediently designed as a screw, the head of which rests against a corresponding shoulder in a bore in the cup shaft and the thread of which is screwed into a corresponding internal thread of the ball.
- these measures also fix the axial position of the joint cup to that of the joint head.
- the spreader is a truncated cone, which has inner spreading surfaces of the joint head under the action of a pressure shock guided through the hollow head shaft.
- the spreader is preferably a truncated cone which tapers to the head shaft and which lies against outer spreading surfaces of the joint head.
- a threaded pin screwed into the hollow head shaft is formed in the center on the small end face of the truncated cone.
- the spreader is thus formed in one piece with the adjusting member designed as a threaded pin and acts on the joint head under tensile load.
- an axial internal thread for receiving a screw is formed in the center of the truncated cone, the head of which bears against a shoulder provided with a corresponding bore in a shaft bore of the head shaft.
- the screw is a commercially available standard part with the appropriate tensile strength and can be obtained inexpensively as such.
- the joint head at least in the region of the swivel ball, has through bores extending radially outwards for a plastic provided in the interior of the joint head.
- the plastic hardens under pressure and is arranged in a réelletederbeauf- estimated cartridge within an axial bore of Gelenkkop ⁇ fes.
- the compression spring conveniently supported under preload with one end with the interposition of a plate on the associated end face of the Pa ⁇ trone and down with the other end to a head shaft screwed into the threaded pin.
- the plastic When the joint head is inserted into the articulated cup, the plastic is pressed out of the cartridge due to the prestress of the compression spring and emerges from the interior through the through holes of the joint head.
- the plastic flows over the Oberflä ⁇ che of the condyle in production-related marks and gleit the existing tolerances between the joint head and the joint pot.
- the plastic hardens under the pressure resulting from the transmitted torques and forms a sliding layer.
- further plastic flows under the action of the compression spring into the space between the joint head and the joint pot, which covers the signs of wear. Since there is only a slight pressure in the through bores under which the plastic does not harden, the plastic continues to flow.
- At least the sliding surfaces of the joint head and / or the joint cup are preferably coated with a lubricant, a lubricious plastic or another lubricious and abrasion-resistant Layer. This results in a sufficient sliding ability of the surfaces on one another, with the surfaces possibly also being refined.
- the articulated coupling is expediently covered with a protective arrangement which does not impair freedom of movement.
- the protective arrangement prevents dirt from entering the articulated coupling and can be manufactured relatively inexpensively.
- 1 shows a section through an articulated coupling according to the invention with aligned shafts
- 2 shows a section through an articulated coupling according to the invention with intersecting shafts
- FIG. 3 is a view of the illustration of FIG. 1 with an alternative joint head
- FIG. 6 is a view into an articulated pot in the direction of arrow VI according to FIG. 5,
- FIG. 7 shows an alternative embodiment of the representation according to FIG. 6,
- FIG. 8 shows a further alternative embodiment of the representation according to FIG. 6,
- FIG. 10 is an enlarged view of the detail X of FIG. 1 in an alternative embodiment
- FIG. 11 shows a first alternative embodiment of the representation according to FIG. 10,
- FIG. 12 shows a second alternative embodiment of the representation according to FIG. 10,
- FIG. 10 shows a third alternative embodiment of the representation according to FIG. 10
- 13 shows a fourth alternative embodiment of the representation according to FIG. 10
- FIG. 14 shows a fifth alternative embodiment of the representation according to FIG. 10,
- FIGS. 10 and 11 show a sixth alternative embodiment of the representation according to FIGS. 10 and
- FIG. 16 shows an enlarged illustration of the detail X according to FIG. 1 in a further alternative embodiment.
- an articulated coupling 1 is shown, which is used as the inner joint of a drive shaft of a front-wheel drive motor vehicle.
- a pot shaft 3 coaxially.
- the outer shape of the articulated pot 2 has, in addition to various gradations 4, an indentation 5, in which a collar 6 of a carrier sleeve 7 is rolled.
- an equilateral hexagonal polygonal bore 8 is let in, with a joint head 9 lying there, which is arranged on a head shaft 10.
- a protective arrangement 11 designed as a bellows extends to the head shaft 10.
- the protective arrangement 11 is sealed by means of a clamp 12 on the one hand on the support sleeve 7 and on the other on the head shaft 10 attached.
- the protective arrangement is provided with folds 13 so that it can follow the movement between the joint head 9 and the joint pot 2.
- the surfaces 14 of the polygonal bore 8 are arranged prismatically to one another approximately half of the joint pot 2, ie they are aligned parallel to the axis of the joint pot 2.
- sliding radii 16 are incorporated, between which the surfaces 14 span tangentially (FIG. 6).
- circular surfaces 17 From the prismatic inner end of the polygonal bore 8, circular surfaces 17 have a circular cross section up to a blind bore 18.
- the sliding radii 16 also follow this cross section, as a result of which the cut edges of the circular surfaces 17 are present as straight lines in sections perpendicular to the axis of the articulated cup 2.
- the blind bore 18 enables the polygonal bore 8 to be produced without the need for slugs.
- the articulated head 9 lying in the polygonal bore 8 has a rotary cross-section 19 which is present in the case of aligned shafts 3, 10 perpendicular to their axes and always perpendicular to the axis of the head shaft 10.
- the rotary cross section 19 has its greatest extent, on which swivel radii 20 are arranged.
- the rotary cross section 19 is designed as a hexagon, six swivel radii 20 are present.
- the joint head 9 can be pivoted about these swivel radii 20 in the polygonal bore 8 and thereby takes the position em shown in FIG. 2. In order to make this possible, the joint head 9 tapers from the swivel radii 20 in both axial orientations.
- a constriction 25 is provided, up to which the taper 40 of the truncated pyramid 43 extends and from which a truncated cone 26 connects as a transition to the top shaft 10.
- the sliding radii 16 move towards one another and the axes of the cup shaft 3 and the head shaft 10 intersect.
- the swivel radii 20 on the rotary cross section 19 with the spherical segment faces 22 which are attached to them also pivot, with a positive connection for transmitting the torque always being present.
- the pivoting can take place both in the end position of the immersion of the joint head 9 m in the articulated cup 2 and in any position within the prismatic polygonal bore 8.
- the elastic protective arrangement 11 does not hinder the pivoting.
- the axially displaced joint head 9 is located in the area of the prismatic polygonal bore 8. In this position, the transmission of the torque is also ensured.
- the joint head 9 shown in FIG. 3 has no constriction and thus passes directly from its truncated pyramid 43 into the head shaft 10 by means of a transition radius 41. 4 and 5, both in the case of an articulated head 9 and also of an articulated pot 2, the area coated with a lubricating varnish 42 is identified by cross hatching.
- the lubricating varnish 42 which replaces the usual lubricants, enables the material pairs to slide easily and prevents them from seizing.
- the sliding lacquer 42 is applied from the free end to behind the tangential transition of the swivel radius 20 into the truncated pyramid 43.
- the lubricating varnish 42 is present within the polygonal bore 8 in the prismatic area on the surfaces 14 and in the ball socket 27.
- the joint head 9 and the ball socket 27 must be degreased with a solvent and then dried.
- the surfaces to be coated are phosphated.
- the lubricating varnish 42 is a thermosetting lubricating varnish with selected solid lubricants and binders.
- the joint head 9 is coated by dipping to the desired depth.
- the ball socket is coated by spraying on the lubricating varnish 42.
- the coating is followed by baking of the lubricating varnish 42 below the tempering temperature of the articulated cup 2 or the joint head 9.
- FIG. 6 shows alternative articulated pots 2, each with concentric blind bore 18 and polygonal bore 8.
- the polygonal bore 8 of FIG. 6 has in its prismatic region between the sliding radii 16 the surfaces 14, which here are flat surfaces 28. 7, arching surfaces 29 are arranged between the sliding radii 16. In the 8 there are underlying surfaces 30 between the sliding radii 16.
- the sliding radii 16 also run there in the region of the ball socket 27 and end at the blind bore 18.
- FIG. 9 shows a section through an articulated coupling 1 with the articulated head 9 inserted in the hexagonal polygonal bore 8.
- the carrier sleeve 7 is cut on the very outside, and in the inner area the head shaft 10 is cut at the upper end of the truncated pyramid 43 in the area of the constriction 25 .
- the head shaft 10 shown in FIGS. 10 and 11 is provided with a shaft bore 31 which opens into the hollow joint head 9.
- the hollow joint head 9 comprises in its interior a conical widening 32 and is provided in the region of the swivel radii 20 with slots 33 which extend as far as the head shaft 10 and two of which lie in the plane of the drawing.
- In the free end of the joint head 9 there is a concentric seat bore 34 with expansion surfaces 36, against which a spreader 35, which is arranged in the expansion 32 and is designed as a ball 38, bears.
- a pressure plunger 37 guided through the shaft bore 31 acts on the ball 38 and thus presses the surfaces and radii of the joint head 9 in the direction of the articulation cup 2.
- the pressure plunger 37 is on the end face 44 assigned to the head shaft 10 by a prestressed compression spring 45, which consists of individual plate springs 46 is put together.
- a prestressed compression spring 45 which consists of individual plate springs 46 is put together.
- the ball 38 is always pressed and pressed into the seat bore 34 of the joint head 9 via the pressure tappet 37, which is why the spherical segment surfaces 22 of the joint head 9 rest in the polygonal bore 8 of the joint head 2 under a predetermined surface pressure.
- the joint head 9 is widened in the elastic region by the spreader 35, as a result of which a correspondingly large negative tolerance can be granted during production.
- For setting or regulation of the preload of the compression spring 45 is supported on a threaded pin 47 screwed into the shaft bore 31 of the head shaft 10.
- the spreader 35 is also designed as a ball 38, which is provided with an internal thread 48 for receiving a tension plunger 50 designed as a screw 49 and bears against inner expansion surfaces 36 of the joint head 9.
- the screw 49 is inserted into the hollow pot shaft 3 and is supported with its head 51 on a corresponding shoulder 51 within the pot shaft 3. By spreading the joint head 9, the joint head becomes at the same time
- the spreader 35 according to FIG. 13 is a truncated cone 38 which is assigned to the pressure tappet 37 and which, when the pressure tappet 37 is displaced outward, bears against the expansion surfaces 36 and thus presses the surfaces and the radii of the joint head 9 in the direction of the joint pot 2.
- the spreading surfaces 36 are adapted to the shape of the truncated cone 39.
- the spreader 35 shown in FIGS. 14 and 15 is also a truncated cone 38 which extends in the direction of the head shaft
- a threaded pin 53 is formed on the small end face 52 of the truncated cone 38 and is screwed into the hollow head shaft 10.
- a further adjustment of the truncated cone 38 is realized by a centrally inner ⁇ is thread 48 formed for receiving a screw 54 in the truncated cone 38th
- the head 55 of the screw 54 lies against one with a corresponding bore 56 provided shoulder 57 in the shaft bore 31 of the head shaft 10.
- the articulated head 9 When assembling the articulated coupling 1, the articulated head 9 is inserted into the articulated cup 3 and the spreader 35 is adjusted until the desired play between the articulated head 9 and the articulated cup 3 is achieved. Subsequently, both the joint head 9 and the joint pot 3 are coated with the lubricating varnish 42 as already explained. After the sliding varnish 42 has been stoved in, the joint head 9 is reinserted into the joint pot 3 and the joint coupling 1 is ready for operation. If there is increased wear-related play during the life of the articulated coupling 1, which is noticeable when knocking noises when the load changes, the spreader 35 is adjusted until the desired play is reached and the articulated head 9 and the articulated cup 3 are again provided with lubricating varnish 42.
- the joint head 9 according to FIG. 16 is provided in the area of its swivel ball with through bores 58 which extend radially outward from an axial bore 59 and are chamfered on the spherical segment surfaces 22.
- a cartridge 60 is accommodated with a plastic 61 that can be hardened under pressure.
- a compression spring 63 composed of a plurality of plate springs 62 is arranged under prestress on the end of the cartridge 60 assigned to the head shaft 10.
- the compression spring 63 is supported on the one hand on a threaded pin 64 screwed into the head shaft 10 and on the other hand on a circumferentially sealed plate 66 assigned to the end face 65 of the cartridge 60. When the joint head 9 is fitted into the joint pot 3, these are inserted one into the other. By increasing the pretension of the compression spring 63 by means of the threaded pin 64, plastic 61 emerges from the cartridge 60 and passes through the through bores 58 into the tolerance-related free space between the swivel ball 21 of the joint head 9 and the ball socket 27 of the joint pot 3 Column and production lines as well as the tolerance-related free space filled.
- the introduction of appropriate torques causes the plastic 61 to be pressurized in the area of the pivot ball 21 and the plastic hardens in this area, but remains fluid in the through bores. Due to the preload by the compression spring 63, during the life of the articulated coupling 1, if the play between the articulated head 9 and the articulated cup 3 increases, additional plastic 61 passes through the through holes to the outside, hardens and thus minimizes the play or keeps the play largely constant .
- Articulated coupling 34 seat bore articulated pot 35 spreader pot shaft 36 spreading flat gradations 37 pressure plunger notch 38 ball collar 39 truncated cone support sleeve 40 tapering polygonal bore 41 transition radius rod end 42 sliding lacquer head shaft 43 truncated pyramid protection arrangement 44 front side clamps 45 compression spring pleating 46 disc spring flat 47 threaded pin corner 49 screw round screw 50 corner screw 48 screw Tappet blind bore 51 shoulder swivel cross section 52 end face swivel radius 53 threaded pivot swivel ball 54 screw spherical segment flat 55 head flattening 56 bore side walls of 23 57 shoulder constriction 58 through hole truncated cone 59 axial bore ball socket 60 cartridge flat flat 61 plastic bulging surface 62 diaphragm spring undergoing bore 64 threaded spring 64 threaded spring 64 threaded spring Face slot 66 plate
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pivots And Pivotal Connections (AREA)
Abstract
Description
Claims
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19827041 | 1998-06-18 | ||
DE19827041 | 1998-06-18 | ||
DE19920569A DE19920569A1 (de) | 1998-06-18 | 1999-05-04 | Gelenkkupplung |
DE19920569 | 1999-05-04 | ||
PCT/DE1999/001751 WO1999066224A1 (de) | 1998-06-18 | 1999-06-11 | Gelenkkupplung |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1088174A1 true EP1088174A1 (de) | 2001-04-04 |
Family
ID=26046870
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99939332A Withdrawn EP1088174A1 (de) | 1998-06-18 | 1999-06-11 | Gelenkkupplung |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1088174A1 (de) |
WO (1) | WO1999066224A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005033536A1 (en) * | 2003-10-08 | 2005-04-14 | Gaspardo Seminatrici S.P.A. | A transmission joint, in particular for transmitting drive between non-aligned shafts |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE7611512U1 (de) * | Regenhardt, Heinz, 4000 Duesseldorf | |||
US2780080A (en) * | 1953-08-19 | 1957-02-05 | Process Gear And Machine Compa | Universal joint |
GB1351449A (en) * | 1970-09-08 | 1974-05-01 | Itw Ltd | Ball and socket joints |
US4080079A (en) * | 1977-01-06 | 1978-03-21 | Visi-Trol Engineering Company | Universal joint |
DE8524285U1 (de) * | 1985-08-24 | 1985-10-03 | Taubert, Hubert, Dipl.-Ing., 5450 Neuwied | Gelenkverbindung zwischen zwei Wellen |
US5527220A (en) * | 1994-03-23 | 1996-06-18 | Halliburton Company | Articulatable joint with multi-faceted ball and socket |
-
1999
- 1999-06-11 WO PCT/DE1999/001751 patent/WO1999066224A1/de not_active Application Discontinuation
- 1999-06-11 EP EP99939332A patent/EP1088174A1/de not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO9966224A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1999066224A1 (de) | 1999-12-23 |
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Legal Events
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