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
  • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
  • F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
  • F16D1/08—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key
  • F16D1/0876—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with axial keys and no other radial clamping
  • F16D1/0882—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with axial keys and no other radial clamping the key being axially tapered and tightening when loaded axially

Definitions

• the present invention relates to a device for the anchorage of an axle at each of its ends, preferably in a pair of fixing lugs or the like, formed with through-holes for the axle, as specified in the pre-characterising part of claim 1.
• a disadvantage with the solution according to US-A-1 493 063 is that the axial bore in the outer end part has to be enlarged in order to permit the movement in a radial direction of the outer end part that is required for it to function.
• a further disadvantage to this solution is that, if the bolt is screwed up somewhat, so that the wedge connection ceases to act, the axle end can slip out of the surrounding part in an axial direction. This solution also means that the strength at the axle end is adversely affected. Due to the wedge angle required, the solution can only be used where the surrounding part has an elongated fixing aperture and the axle has a relatively small diameter.
• the second solution according to US-A-5 538 356 has to be tightened up by means of a tightening tool, since mechanical deformation of the said elements is bound to occur if they are forced up on to a section with a different radius of curvature.
• the internally tapered wedge elements will mean that play occurs between the elements of the collar and the axle, since the above-mentioned deformation never permits full contact between the parts, which means that this connection will have to be re-tightened at regular intervals. Tightening also has to be done at both ends of the axle simultaneously, that is to say the axle has to be braced in order to prevent the axle rotating when tightening is carried out.
• An object of the present invention is to produce a device of the type initially referred to, which gives the axle ends good strength, which will enable an axle to be anchored at each of its ends in a pair of fixing lugs or the like, formed with through-holes for the axle, the said device allowing easy manual tightening of one side at a time without bracing, and being incapable of accidental removal from the axle when this is placed in the fixing lugs, the said device furthermore being easy and cheap both to manufacture and maintain, and resulting in such extensive free surfaces at the axle ends that necessary text marking can be applied there giving good legibility.
• the object has been achieved by a device having the characteristics specified in claim 1.
• Preferred embodiments of the device moreover have any or some of the characteristics specified in the subordinate claims.
• the full contact also means greater freedom to choose greater wedge angles, which will facilitate any subsequent dismantling.
• the flanges at the segmental-shaped end surfaces of the bodies will function as a physical stop and prevent the axle falling out of the fixing lugs. In any subsequent dismantling the lip on one side will rest against the fixing lug and be forced to separate from the axle.
• the lip also provides the facility for using a pull- off tool that grips around this when dismantling.
• the lip furthermore means that additional locking devices on the end surfaces or fixing lugs become superfluous, which minimises the axial projection at the sides and reduces the costs.
• Fig.l shows an exploded view of a first embodiment of the device according to the invention in which the various parts can be seen.
• Fig.2 shows a section through an axle which is provided with a device according to the invention as in figure 1.
• Fig.3 shows an exploded view of an alternative embodiment of the device according to the invention in which two wedge elements are arranged with a 120° angle between them.
• Fig.4 shows an end view of the device according to figure 1 or figure 2.
• Fig.5 shows an embodiment with a projecting section surrounded by the guide bevel, in which the bolt head is sunk, for additional protection against external effects.
• Fig.6 shows an exploded view of an embodiment with an axial bore made through the entire length of the axle, and a bolt arranged in the said bore for acting on the bodies at both ends of the axle.
• Figure 1 shows a first embodiment of a device according to the invention in a cylindrical axle 1.
• the axle 1 is designed to be anchored at its ends, preferably in a pair of fixing lugs 2 or the like, formed with through-holes for the axle (see figure 2).
• a guide bevel la At each end of the axle is a guide bevel la, which facilitates insertion of the axle into the fixing lugs 2.
• a chamfer 3 At each end of the axle there is also a chamfer 3, which is designed so that a plane slide surface with an essentially elliptical segmental shape is located between a chord at the axle end and the outer surface of the axle.
• the slide surface forms an angle a with the longitudinal axis of the axle.
• a cylindrical axle section Between the plane chamfers 3 at the ends of the axle is a cylindrical axle section.
• bodies 4 having a form that corresponds to the plane chamfered part of each axle end and a section extended axially adjacent to the guide bevel 1 a and terminated by a segmental-shaped end 4a, can be inserted into the said lugs.
• a flange 4b On the curve of the segmental-shaped end is a flange 4b, directed radially outwards past the periphery of the axle, which is designed to function as a stop and prevent the axle leaving the fixing lugs in an axial direction after it has been fitted.
• the bodies 4 are designed to act as wedges with points directed towards the cylindrical centre section of the axle.
• each chamfer is a tapped axial bore 5.
• a bolt 6 is designed to interact with the tapped bore 5 so that, when the bolt is screwed in towards the axle end, the head 6a of the bolt will press against the segmental-shaped end surface 4a of the body, thereby imparting to the body 4 a movement in an axial direction towards the cylindrical section. The body will then move up the plane slide surface at the end of the axle so that the latter is thereby anchored in the fixing lug 2 by means of the wedging action.
• FIG. 2 shows a section through the axle 1 , which is provided with the device according to the invention and located in a pair of fixing lugs 2, formed with through-holes for the axle. Since the device is the same at each end of the axle, only the one axle end will be described.
• the guide bevel la and the chamfer 3 which leaves the plane slide surface. The slide surface forms an angle a with the longitudinal axis of the axle. Between the plane chamfers at each end of the axle is the cylindrical axle section. After placing the axle in the fixing lug holes a body 4 has been inserted into each hole, the axial extent of which body towards the cylindrical section of the axle is less than the axial extent of the fixing lug in the same direction.
• the body 4 presents a wedge shape that corresponds to the plane chamfered part of each axle end, together with a section, extended axially adjacent to the guide bevel la at the axle end and terminated by the flange 4b, directed radially outwards past the periphery of the axle.
• the flange 4b will function as a stop and prevent the axle 1 leaving the fixing lugs 2 in an axial direction.
• the tapped axial bore 5 At the axle end, below each chamfer 3 is the tapped axial bore 5.
• the bolt 6 interacts with the tapped bore 5 so that, when the bolt is screwed in towards the axle end, the head 6a of the bolt will press against the end 4a of the body and press this up the smooth slide surface, so that the axle end is thereby anchored in the fixing lug 2 by means of the wedging action.
• Figure 3 shows how a plurality of bodies 4 can be arranged at each end of the axle in the case of large axle diameters. The said bodies are then arranged in the same way as described in connection with figure 1 and figure 2. The figure shows how two bodies 4 are arranged at each end of the axle with an angle of 120° between them, so that the locking force is equally distributed around the circumference of the axle end.
• Figure 4 shows an end view of the device according to figure 1 and 2.
• the segmental-shaped end 4a can be seen from this.
• the curve with the flange 4b directed radially outwards past the periphery of the axle and designed to function as a stop, preventing the axle from leaving the fixing lugs 2 in an axial direction.
• Figure 5 shows an alternative embodiment in which a projecting section, surrounded by the guide bevel la formed on the circumference, is arranged at the end of the axle, in which section the head 6a of the bolt 6, here shown as a hexagon socket bolt, is sunk.
• This design gives the bolt 6 additional protection against external effects.
• Figure 6 shows how the axle can be provided with an axial bore 5, made through the entire length of the axle and ending at each end of the axle immediately below each plane chamfer 3.
• a bolt 6 which at a first end has a head 6a, which bears against the essentially segmental-shaped end 4a of the one body and at the other end has a nut 7, interacting with a thread on the bolt, the said nut bearing against essentially segmental-shaped end 4a of the second body.
• the bodies 4 are designed to have a movement imparted to them in an axial direction towards the cylindrical section when a torsional tightening movement is imparted to the bolt connection.
• This design may have advantages particularly where it is desirable to be able to tighten the bolt connection from one side.
• the bolt 6 may be a stud bolt which interacts with two nuts 7, each bearing against the respective, essentially segmental-shaped ends 4a of the bodies.
• the device may, for example, be made so that the bore 5 partly ends at the essentially segmental- shaped ends 4a of the bodies, so as to provide the bolt heads or nuts with a larger bearing surface against this.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Steering-Linkage Mechanisms And Four-Wheel Steering (AREA)
• Vehicle Body Suspensions (AREA)
• Clamps And Clips (AREA)
• Mutual Connection Of Rods And Tubes (AREA)
• Standing Axle, Rod, Or Tube Structures Coupled By Welding, Adhesion, Or Deposition (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=20409611

Family Applications (1)

Country Status (6)

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• 1997
  • 1997-12-30 SE SE9704913A patent/SE9704913L/ not_active IP Right Cessation
• 1998
  • 1998-12-10 EP EP98965915A patent/EP1042617A1/de not_active Withdrawn
  • 1998-12-10 WO PCT/SE1998/002271 patent/WO1999034120A1/en not_active Application Discontinuation
  • 1998-12-10 AU AU21928/99A patent/AU2192899A/en not_active Abandoned
  • 1998-12-10 JP JP2000526747A patent/JP2002500321A/ja active Pending
  • 1998-12-10 KR KR1020007005900A patent/KR20010032624A/ko not_active Application Discontinuation

Non-Patent Citations (1)

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