WO2006119817A1 - Improved toothed coupling for transmitting motion between two shafts - Google Patents

Improved toothed coupling for transmitting motion between two shafts Download PDF

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Publication number
WO2006119817A1
WO2006119817A1 PCT/EP2006/002655 EP2006002655W WO2006119817A1 WO 2006119817 A1 WO2006119817 A1 WO 2006119817A1 EP 2006002655 W EP2006002655 W EP 2006002655W WO 2006119817 A1 WO2006119817 A1 WO 2006119817A1
Authority
WO
WIPO (PCT)
Prior art keywords
coupling according
hub
teeth
external
bodies
Prior art date
Application number
PCT/EP2006/002655
Other languages
French (fr)
Inventor
Paola Bianchi
Roberto Sganzerla
Original Assignee
Paola Bianchi
Roberto Sganzerla
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Paola Bianchi, Roberto Sganzerla filed Critical Paola Bianchi
Publication of WO2006119817A1 publication Critical patent/WO2006119817A1/en

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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
    • F16D3/84—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor
    • F16D3/843—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor enclosed covers
    • 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
    • F16D3/18—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts the coupling parts (1) having slidably-interengaging teeth
    • F16D3/185—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts the coupling parts (1) having slidably-interengaging teeth radial teeth connecting concentric inner and outer coupling parts

Definitions

  • the present invention relates to an improved toothed coupling for transmitting motion between two shafts.
  • Articulated couplings in general allow mechanical connection, for motion transmission, between shafts which are not coaxial and have, for example, parallel axes which do not coincide or axes which are not parallel but are incident.
  • a type of articulated coupling which is used extensively in all heavy-duty situations, such as shafts of steam turbines, propeller shafts, rolling mills, et cetera, is the toothed coupling, in which the hubs, supported by the two shafts, are provided with peripheral sets of teeth.
  • the corresponding internal sets of teeth of the bell that connects the two hubs engage such peripheral sets of teeth.
  • the sets of teeth can be shaped like slotted profiles or can have a barrel-shaped profile, so as to allow angles of 2-3° between the shafts.
  • Toothed couplings have great load-bearing capacities, but they are affected by drawbacks, including the need for careful maintenance, especially as regards internal lubrication.
  • the aim of the present invention is to provide a coupling which has self-lubricating characteristics.
  • An object of the present invention is to provide a coupling which has modular characteristics which allow quick and easy maintenance and replacement of its consumable components.
  • a further object is to provide a toothed coupling which can be manufactured at competitive production costs.
  • an improved toothed coupling for transmitting motion between two shafts comprising a hub and two annular external bodies, each of said bodies being coupled to the end of a respective shaft, characterized in that it comprises a sealing means which retains lubricant at least in the region comprised between said hub and said external bodies.
  • Figure 1 is a longitudinal sectional view of a toothed coupling according to the invention.
  • FIG. 2 is an exploded perspective view of the toothed coupling according to the present invention.
  • a toothed coupling according to a preferred embodiment of the invention generally designated by the reference numeral 1, comprises a hub 2, which is constituted by a substantially cylindrical body provided with two radial sets of teeth, designated respectively by the reference numerals 3 and 4.
  • the coupling has two external bodies, designated respectively by the reference numerals 5 and 6, each of which can be associated with a respective shaft 105 and 106.
  • Each external body is constituted by a ring, which rotates rigidly with the hub 2 owing to the presence of internal sets of teeth, designated respectively by the reference numerals 7 for the external body 5 and 8 for the external body 6, which are suitable to engage the respective radial sets of teeth 3 and 4 of the hub 2.
  • Each internal set of teeth 7 and 8 allows the teeth of the respective radial sets of teeth 3 and 4 to slide along a longitudinal axis which is parallel to the rotation axis of the external body 5, 6.
  • Each external body 5, 6 comprises flanges 12 which are provided with axial threaded holes 13, which can be engaged by screws 14 for connecting flanges 155 and 166 of the respective shafts 105 and 106.
  • Contoured plates 16 are applied to the ends of the central body 2 and have an external camber which rests against a respective disk 9 which is associated with the end of each external body 5 and 6.
  • a gasket 17 is applied around the two external bodies 5 and 6 and is substantially constituted by a ring made of elastic material, such as rubber, metal, or both rubber and metal, which is suitable to provide a seal between the external bodies, isolating the central body 2 with respect to the outside.
  • the lubricant can be inserted in the coupling by means of lubrication means constituted for example by a lubrication duct closed by a greasing device.
  • An advantage of the coupling according to the present invention is that it requires substantially reduced maintenance with respect to traditional couplings having a similar performance, especially as regards lubrication.
  • the coupling according to the invention is susceptible of numerous modifications and variations, within the scope of the appended claims. All the details may be replaced with technically equivalent elements.
  • the materials used, as well as the dimensions, may be any according to requirements and to the state of the art.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Details Of Gearings (AREA)

Abstract

An improved coupling for transmitting motion between two shafts has a hub (2) and two annular external bodies (5,6); each body can be coupled to the end of a respective shaft (105,106); a sealing means (17) retains lubricant at least in the region (19) comprised between the hub and the external bodies.

Description

IMPROVED TOOTHED COUPLING FOR TRANSMITTING MOTION BETWEEN TWO
SHAFTS
The present invention relates to an improved toothed coupling for transmitting motion between two shafts. Articulated couplings in general allow mechanical connection, for motion transmission, between shafts which are not coaxial and have, for example, parallel axes which do not coincide or axes which are not parallel but are incident.
With an appropriate combination of articulated couplings it is also possible to transmit motion between shafts whose axes are neither parallel nor incident. A type of articulated coupling which is used extensively in all heavy-duty situations, such as shafts of steam turbines, propeller shafts, rolling mills, et cetera, is the toothed coupling, in which the hubs, supported by the two shafts, are provided with peripheral sets of teeth. The corresponding internal sets of teeth of the bell that connects the two hubs engage such peripheral sets of teeth. The sets of teeth can be shaped like slotted profiles or can have a barrel-shaped profile, so as to allow angles of 2-3° between the shafts.
Toothed couplings have great load-bearing capacities, but they are affected by drawbacks, including the need for careful maintenance, especially as regards internal lubrication. The aim of the present invention is to provide a coupling which has self-lubricating characteristics.
An object of the present invention is to provide a coupling which has modular characteristics which allow quick and easy maintenance and replacement of its consumable components. A further object is to provide a toothed coupling which can be manufactured at competitive production costs.
This aim and these and other objects, which will become better apparent hereinafter, are achieved by an improved toothed coupling for transmitting motion between two shafts, comprising a hub and two annular external bodies, each of said bodies being coupled to the end of a respective shaft, characterized in that it comprises a sealing means which retains lubricant at least in the region comprised between said hub and said external bodies.
Further characteristics and advantages of the invention will become better apparent from the description of preferred but not exclusive embodiments thereof, illustrated by way of non-limiting example in the accompanying drawings, wherein:
Figure 1 is a longitudinal sectional view of a toothed coupling according to the invention;
Figure 2 is an exploded perspective view of the toothed coupling according to the present invention. With reference to the cited figures, a toothed coupling according to a preferred embodiment of the invention, generally designated by the reference numeral 1, comprises a hub 2, which is constituted by a substantially cylindrical body provided with two radial sets of teeth, designated respectively by the reference numerals 3 and 4.
The coupling has two external bodies, designated respectively by the reference numerals 5 and 6, each of which can be associated with a respective shaft 105 and 106. Each external body is constituted by a ring, which rotates rigidly with the hub 2 owing to the presence of internal sets of teeth, designated respectively by the reference numerals 7 for the external body 5 and 8 for the external body 6, which are suitable to engage the respective radial sets of teeth 3 and 4 of the hub 2. Each internal set of teeth 7 and 8 allows the teeth of the respective radial sets of teeth 3 and 4 to slide along a longitudinal axis which is parallel to the rotation axis of the external body 5, 6.
Each external body 5, 6 comprises flanges 12 which are provided with axial threaded holes 13, which can be engaged by screws 14 for connecting flanges 155 and 166 of the respective shafts 105 and 106.
Contoured plates 16 are applied to the ends of the central body 2 and have an external camber which rests against a respective disk 9 which is associated with the end of each external body 5 and 6.
According to the invention, a gasket 17 is applied around the two external bodies 5 and 6 and is substantially constituted by a ring made of elastic material, such as rubber, metal, or both rubber and metal, which is suitable to provide a seal between the external bodies, isolating the central body 2 with respect to the outside.
In this manner, in the internal region 19 formed by the external bodies 5 and 6 and by the gasket 17 it is possible to insert lubricant, for example of the type used in bearings. The disks 9 help to isolate the internal parts of the coupling from the outside.
The lubricant can be inserted in the coupling by means of lubrication means constituted for example by a lubrication duct closed by a greasing device.
In practice it has been found that the invention achieves the intended aim and objects, an improved toothed coupling with self-lubricating characteristics having been provided which is capable of coupling non-coaxial shafts, ensuring effective motion transmission.
An advantage of the coupling according to the present invention is that it requires substantially reduced maintenance with respect to traditional couplings having a similar performance, especially as regards lubrication. The coupling according to the invention is susceptible of numerous modifications and variations, within the scope of the appended claims. All the details may be replaced with technically equivalent elements.
The materials used, as well as the dimensions, may be any according to requirements and to the state of the art.

Claims

1. An improved toothed coupling for transmitting motion between two shafts, comprising a hub and two annular external bodies, each of said bodies being coupled to the end of a respective shaft, characterized in that it comprises a sealing means which retains lubricant at least in the region comprised between said hub and said external bodies.
2. The toothed coupling according to claim 1 , characterized in that said hub is constituted by a substantially cylindrical body provided with two radial sets of teeth.
3. The toothed coupling according to claim 1 or 2, characterized in that each external body is constituted by a ring which rotates rigidly with said hub by means of internal sets of teeth adapted to engage the respective radial sets of teeth of said hub.
4. The coupling according to one or more of the preceding claims, characterized in that each internal set of teeth allows the teeth of the respective radial sets of teeth to slide along a longitudinal axis which is parallel to the rotation axis of said external body.
5. The coupling according to one or more of the preceding claims, characterized in that each external body comprises flanges provided with axial threaded holes that are engaged by screws in order to connect flanges of said shafts.
6. The coupling according to one or more of the preceding claims, characterized in that contoured plates are applied to the ends of said central body and have an external camber which rests against the end of the respective shaft.
7. The coupling according to one or more of the preceding claims, characterized in that said sealing means comprises a gasket which is applied around said external bodies.
8. The coupling according to one or more of the preceding claims, characterized in that said gasket is constituted by a ring made of elastic material, such as rubber, which is suitable to provide a seal between said external bodies, isolating the hub with respect to the outside.
9. The coupling according to one or more of the preceding claims, characterized in that it is possible to insert lubricant in the internal region formed by said external bodies and by the gasket.
10. The coupling according to one or more of the preceding claims, characterized in that it comprises a lubrication means for introducing said lubricant in the coupling.
11. The coupling according to one or more of the preceding claims, characterized in that said lubrication means is constituted by a lubrication duct which is closed by a greasing device.
PCT/EP2006/002655 2005-05-13 2006-03-23 Improved toothed coupling for transmitting motion between two shafts WO2006119817A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI2005A000865 2005-05-13
ITMI20050865 ITMI20050865A1 (en) 2005-05-13 2005-05-13 TEETH JOINT PERFECTED FOR THE TRANSMISSION OF THE MOTORCYCLE BETWEEN TWO TREES

Publications (1)

Publication Number Publication Date
WO2006119817A1 true WO2006119817A1 (en) 2006-11-16

Family

ID=36570603

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/002655 WO2006119817A1 (en) 2005-05-13 2006-03-23 Improved toothed coupling for transmitting motion between two shafts

Country Status (2)

Country Link
IT (1) ITMI20050865A1 (en)
WO (1) WO2006119817A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB848178A (en) * 1957-11-27 1960-09-14 Panhard & Levassor Improvements in universal joints in particular for automobile vehicle transmissions
DE2422181A1 (en) * 1974-05-08 1975-11-27 Bosch Gmbh Robert Unaligned shaft coupling - cylindrical bellows attached to shaft ends by rigid unions
DE29808627U1 (en) * 1998-05-13 1998-07-23 Power Transmission Company, N.V., Oostkamp Curved tooth coupling
DE19855593A1 (en) * 1998-12-02 2000-06-21 Zahnradfabrik Friedrichshafen Curved tooth gear coupling has bellows seal enclosing central coupling part, which engages outer coupling parts sealed wrt fixed housing parts, connected to fixed parts in sealed manner
DE10136903A1 (en) * 2001-07-28 2003-02-06 Veit Schmidt Corrugated-tube coupling device has its corrugated tube in form of tube rolled to corrugated shape
WO2006037643A1 (en) * 2004-10-05 2006-04-13 Bianchi, Paola Articulated joint for transmitting motion between two shafts

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB848178A (en) * 1957-11-27 1960-09-14 Panhard & Levassor Improvements in universal joints in particular for automobile vehicle transmissions
DE2422181A1 (en) * 1974-05-08 1975-11-27 Bosch Gmbh Robert Unaligned shaft coupling - cylindrical bellows attached to shaft ends by rigid unions
DE29808627U1 (en) * 1998-05-13 1998-07-23 Power Transmission Company, N.V., Oostkamp Curved tooth coupling
DE19855593A1 (en) * 1998-12-02 2000-06-21 Zahnradfabrik Friedrichshafen Curved tooth gear coupling has bellows seal enclosing central coupling part, which engages outer coupling parts sealed wrt fixed housing parts, connected to fixed parts in sealed manner
DE10136903A1 (en) * 2001-07-28 2003-02-06 Veit Schmidt Corrugated-tube coupling device has its corrugated tube in form of tube rolled to corrugated shape
WO2006037643A1 (en) * 2004-10-05 2006-04-13 Bianchi, Paola Articulated joint for transmitting motion between two shafts

Also Published As

Publication number Publication date
ITMI20050865A1 (en) 2006-11-14

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