EP2229316A1 - Drive joints and use of said drive joint - Google Patents

Drive joints and use of said drive joint

Info

Publication number
EP2229316A1
EP2229316A1 EP08868708A EP08868708A EP2229316A1 EP 2229316 A1 EP2229316 A1 EP 2229316A1 EP 08868708 A EP08868708 A EP 08868708A EP 08868708 A EP08868708 A EP 08868708A EP 2229316 A1 EP2229316 A1 EP 2229316A1
Authority
EP
European Patent Office
Prior art keywords
joint
drive
propeller
shaft
drive joint
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Withdrawn
Application number
EP08868708A
Other languages
German (de)
French (fr)
Inventor
Terje Lund
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Powertrain Europe AS
Original Assignee
Powertrain Europe AS
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 Powertrain Europe AS filed Critical Powertrain Europe AS
Publication of EP2229316A1 publication Critical patent/EP2229316A1/en
Withdrawn legal-status Critical Current

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
    • F16D3/22—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 the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
    • F16D3/223—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 the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
    • F16D3/224—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 the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts the groove centre-lines in each coupling part lying on a sphere
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H23/00—Transmitting power from propulsion power plant to propulsive elements
    • B63H23/32—Other parts
    • 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
    • F16D3/845—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor enclosed covers allowing relative movement of joint parts due to the flexing of the cover
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H23/00—Transmitting power from propulsion power plant to propulsive elements
    • B63H23/32—Other parts
    • B63H23/34—Propeller shafts; Paddle-wheel shafts; Attachment of propellers on shafts
    • B63H2023/344—Propeller shafts; Paddle-wheel shafts; Attachment of propellers on shafts comprising flexible shafts members
    • 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
    • F16D3/22—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 the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
    • F16D3/223—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 the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
    • F16D2003/22313—Details of the inner part of the core or means for attachment of the core on the shaft

Definitions

  • the present invention relates to a drive joint for transmission of rotary motion between a drive unit and a propeller shaft with a propeller for propulsion of a boat, wherein the drive joint, comprises a flexible joint enclosed by a housing and provided for handling thrust forces from the propeller during operations. Further the invention relates to a use of said drive joint.
  • the above mentioned constant velocity joint is as mentioned earlier designed for use in cars. These joints can normally not be subjected to large thrust forces in more than one direction. This is not particularly a weakness in the mentioned application since the need for use of said thrust force in a drive shaft is not significant in the car industry. Axially operating forces in such a drive shaft is minimal.
  • a constant velocity joint of the present type can be adapted for use in small boats as a flexible joint between the propeller shaft and the gear box on board the boat. As far as one has been able to determine such joints have not earlier been conceived for use in the maritime field, that is for use in boat propulsion, thus will be a completely new application of the constant velocity joint.
  • a drive joint as described earlier which according to the invention is characterized in that to the exit shaft of the joint a locking ring is attached, provided at the inner or free end of the shaft and is dimensioned for handling thrust forces from the propeller during operations, where the housing outside the exit shaft's inner end is provided with an opening for direct access to the locking ring during assembly and dismounting of the drive joint.
  • a drive joint having a flexible joint for transmission of rotary motion as a drive joint between a gear box and a propeller shaft on board a boat, wherein the drive joint is constructed to handle both pushing and pulling thrust forces from the propeller during operations.
  • the joint can sustain thrust forces acting in both directions, that are pushing thrust forces created by the propeller when the boat is moving forward, and pulling thrust forces created by the propeller when the boat is moving astern.
  • the purpose of the joint is to transmit a rotary motion of a given rotary momentum with continuous small angular changes between the entering and exiting parts of the shaft due to the movement of the boat at sea during operations.
  • this force will cause a small change in angles.
  • Same relationship in the opposite direction is present when the boat is moving astern. In a boat without any kind of flexible element this would result in significant vibrations.
  • this problem is eliminated.
  • a vary significant advantage of this joint is also that the angular deviation can be up to 7 or 8 degrees which is quite unique in this relationship.
  • Figure 1 shows a longitudinal cross section of a drive joint according to the invention across the line I-I on figure 2
  • Figure 2 shows a cross section of the drive joint seen in the direction of the arrow A on figure 1 ,
  • Figure 3 shows a corresponding axial cross section as shown in figure 1 where the cross section is in a plane where the balls of the joint are not visible, and
  • Figure 4 shows a cut-away perspective of the drive joint with the same cross section of planes as shown in figure 1.
  • drive joint 1 is an industrialized version of a drive joint for a car where the joint has been modified in order to sustain thrust forces in both directions and is simultaneously designed for easy assembly and disassembly on board a boat.
  • drive joint 1 comprises an external housing 2 which encloses a flexible joint 3 which is designed to transmit a rotational momentum and simultaneously sustain push or pull thrust forces caused by the propeller during operations, while the joint permits angular deviations between the entering and exiting parts of the joint.
  • the construction of the joint 3 will be disclosed in further details later.
  • the drive joint further comprises an exit shaft 4 which at its outer end is provided with a coupling head 5 with a depression for attachment of a clamping ring 6 for clamping of a propeller shaft for the propeller (not shown).
  • the housing 2 is provided with a flange 7 with four holes 8 for bolts for attachment of the drive joint to an exit shaft (not shown) from a drive unit which in this case is a gear box on board the actual boat.
  • a closing rubber bellows 9 is provided between the outer housing 2 and the exit shaft 4 of the drive shaft, said bellows being attached to the shaft 4 at on end and attached to the housing 2 at the other end via a closing cover 10.
  • the flexible joint 3 comprises six balls 11 that are arranged in corresponding openings in a ball holder in the form of a so called ball grid 12, similarly to a ball bearing.
  • the balls can move along a transverse outer and inner curved tracks while simultaneously transmitting rotational momentum.
  • outer curved tracks 13 are provided in the outer housing 2
  • inner curved tracks 14 are provided in the inner ring 15.
  • the inner ring 15 are rotationally fixed attached to the exit shaft 4 since the ring is provided with an inner set of longitudinal teeth ,(not shown on the drawings) that meshes with corresponding teeth (not shown) that are provided on the surface of the shaft.
  • the curvature of the inner and the outer tracks are adapted to each other in such a way that the balls 11 continuously faces both the inner and the outer track at different angular deviations between the housing 2 and the exit shaft 4.
  • the tracks are surface treated and honed, in order to minimize the friction between the balls and the tracks.
  • the drive joint is constructed in such a way that it sustains both push and pull thrust forces from the propeller during operations.
  • the thrust force from the propeller are sustained by the balls 11 since these are forced against the ball tracks due to the mutually converging motion of said tracks in the forward direction.
  • pull forces from the propeller are sustained by the balls 11 and with a locking ring 16 attached to a peripheral track in the exit shaft provided at said shaft's free or inner end, wherein the locking ring is facing an adjacent side edge of the inner ring 15.
  • the locking ring is dimensioned sufficiently strongly in order to handle the pulling forces from the propeller.
  • the locking ring can advantageously be a seeger ring as shown on figure 4.
  • the outer housing 2 is provided with an opening 17 just above the free or inner end of the exit shaft 4. Due to this opening one achieves direct access to the locking ring 16 and thus convenient assembly or disassembly of the drive joint.
  • the drive joint according to the invention will in many ways represents a revolution in the boat market.
  • a boat manufacture will, using this joint, be able to attached engine and gear in relationship to the propeller shaft in a significantly shorter period than earlier while the result is improved.
  • later adjustment will not be necessary since the joint will sustain motions that will occur.
  • Large boats will further have a certain movement in the hull. All these issues have traditionally been a problem in all boats with propeller propulsion.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Motor Power Transmission Devices (AREA)

Abstract

A drive joint for transmission of rotary motion between a drive unit a propeller shaft with a propeller for propulsion of a boat, where the drive joint (1) comprises a flexible joint (3) which is enclosed by a housing (2) and is designed to sustain thrust forces from the propeller during operations. At the exit shaft (4) of the joint (1) an attachment ring (16) is attached at the inner or free end of the shaft (4) and is dimensioned in order to sustain full forces from the propeller during operations. The housing (2) is provided with an opening (17) above the inner or free end of the exit shaft (4) for direct access to the locking ring (16) during assembly and disassembly of the drive joint.

Description

Drive joints and use of said drive joint
The present invention relates to a drive joint for transmission of rotary motion between a drive unit and a propeller shaft with a propeller for propulsion of a boat, wherein the drive joint, comprises a flexible joint enclosed by a housing and provided for handling thrust forces from the propeller during operations. Further the invention relates to a use of said drive joint.
Various embodiments of drive joints are already known for use as drive joints in front wheel drive cars. These are known as constant velocity drive joints. The issue with "constant velocity" is that the traditional universal joint with a cross shaft leads to a non-constant velocity which relates to the different angle between the incoming and the outgoing part of the joint. In a constant velocity joint this problem is eliminated. In a front wheel drive car it is absolutely necessary to achieve a constant velocity since otherwise one would experience vibrations in the interior of the car when the car is springing or turning.
The above mentioned constant velocity joint is as mentioned earlier designed for use in cars. These joints can normally not be subjected to large thrust forces in more than one direction. This is not particularly a weakness in the mentioned application since the need for use of said thrust force in a drive shaft is not significant in the car industry. Axially operating forces in such a drive shaft is minimal.
The present inventor has found that a constant velocity joint of the present type can be adapted for use in small boats as a flexible joint between the propeller shaft and the gear box on board the boat. As far as one has been able to determine such joints have not earlier been conceived for use in the maritime field, that is for use in boat propulsion, thus will be a completely new application of the constant velocity joint.
It is therefore an object of the invention to provide a constant velocity joint suitable for use as a drive joint for propulsion of boats.
To achieve this objective it is provided a drive joint as described earlier which according to the invention is characterized in that to the exit shaft of the joint a locking ring is attached, provided at the inner or free end of the shaft and is dimensioned for handling thrust forces from the propeller during operations, where the housing outside the exit shaft's inner end is provided with an opening for direct access to the locking ring during assembly and dismounting of the drive joint.
Since this regards a new use of the drive joint it is according to the invention also provided a use of a drive joint having a flexible joint for transmission of rotary motion, as a drive joint between a gear box and a propeller shaft on board a boat, wherein the drive joint is constructed to handle both pushing and pulling thrust forces from the propeller during operations.
During operation of the drive joint for propulsion of boats it is essential that the joint can sustain thrust forces acting in both directions, that are pushing thrust forces created by the propeller when the boat is moving forward, and pulling thrust forces created by the propeller when the boat is moving astern. The purpose of the joint is to transmit a rotary motion of a given rotary momentum with continuous small angular changes between the entering and exiting parts of the shaft due to the movement of the boat at sea during operations. When the boat is moving forward and the propeller thrusting forward due to the pressure from the propeller, this force will cause a small change in angles. Same relationship in the opposite direction is present when the boat is moving astern. In a boat without any kind of flexible element this would result in significant vibrations. With the drive joint according to the invention this problem is eliminated. A vary significant advantage of this joint is also that the angular deviation can be up to 7 or 8 degrees which is quite unique in this relationship.
The invention will here be disclosed in details with an exemplary embodiment with references to the drawings wherein
Figure 1 shows a longitudinal cross section of a drive joint according to the invention across the line I-I on figure 2, Figure 2 shows a cross section of the drive joint seen in the direction of the arrow A on figure 1 ,
Figure 3 shows a corresponding axial cross section as shown in figure 1 where the cross section is in a plane where the balls of the joint are not visible, and
Figure 4 shows a cut-away perspective of the drive joint with the same cross section of planes as shown in figure 1.
As a starting point the drive joint according to the invention is an industrialized version of a drive joint for a car where the joint has been modified in order to sustain thrust forces in both directions and is simultaneously designed for easy assembly and disassembly on board a boat. As is shown by the drawings drive joint 1 comprises an external housing 2 which encloses a flexible joint 3 which is designed to transmit a rotational momentum and simultaneously sustain push or pull thrust forces caused by the propeller during operations, while the joint permits angular deviations between the entering and exiting parts of the joint. The construction of the joint 3 will be disclosed in further details later.
The drive joint further comprises an exit shaft 4 which at its outer end is provided with a coupling head 5 with a depression for attachment of a clamping ring 6 for clamping of a propeller shaft for the propeller (not shown). At the other end of the drive joint the housing 2 is provided with a flange 7 with four holes 8 for bolts for attachment of the drive joint to an exit shaft (not shown) from a drive unit which in this case is a gear box on board the actual boat.
Between the outer housing 2 and the exit shaft 4 of the drive shaft a closing rubber bellows 9 is provided, said bellows being attached to the shaft 4 at on end and attached to the housing 2 at the other end via a closing cover 10.
In the disclosed embodiment the flexible joint 3 comprises six balls 11 that are arranged in corresponding openings in a ball holder in the form of a so called ball grid 12, similarly to a ball bearing. The balls can move along a transverse outer and inner curved tracks while simultaneously transmitting rotational momentum. In this way outer curved tracks 13 are provided in the outer housing 2 and inner curved tracks 14 are provided in the inner ring 15. The inner ring 15 are rotationally fixed attached to the exit shaft 4 since the ring is provided with an inner set of longitudinal teeth ,(not shown on the drawings) that meshes with corresponding teeth (not shown) that are provided on the surface of the shaft. The curvature of the inner and the outer tracks are adapted to each other in such a way that the balls 11 continuously faces both the inner and the outer track at different angular deviations between the housing 2 and the exit shaft 4. The tracks are surface treated and honed, in order to minimize the friction between the balls and the tracks.
As mentioned earlier the drive joint is constructed in such a way that it sustains both push and pull thrust forces from the propeller during operations. When the boat is moving forward the thrust force from the propeller are sustained by the balls 11 since these are forced against the ball tracks due to the mutually converging motion of said tracks in the forward direction. When the boat moves astern, pull forces from the propeller are sustained by the balls 11 and with a locking ring 16 attached to a peripheral track in the exit shaft provided at said shaft's free or inner end, wherein the locking ring is facing an adjacent side edge of the inner ring 15. The locking ring is dimensioned sufficiently strongly in order to handle the pulling forces from the propeller. The locking ring can advantageously be a seeger ring as shown on figure 4.
When transmission of forces takes place when the drive joint has a certain angle between the entering and exiting parts, said parts adjust to the size of the angle while a part transmission is not changed at all. Depending on the size of the angles the balls will wander back and forth in their tracks while being forced towards the ball tracks when the propeller exerts a thrust force or pulling force on the joint.
As shown by the drawings, the outer housing 2 is provided with an opening 17 just above the free or inner end of the exit shaft 4. Due to this opening one achieves direct access to the locking ring 16 and thus convenient assembly or disassembly of the drive joint.
The drive joint according to the invention will in many ways represents a revolution in the boat market. A boat manufacture will, using this joint, be able to attached engine and gear in relationship to the propeller shaft in a significantly shorter period than earlier while the result is improved. Furthermore, later adjustment will not be necessary since the joint will sustain motions that will occur. Large boats will further have a certain movement in the hull. All these issues have traditionally been a problem in all boats with propeller propulsion. These problems are eliminated using the present drive joint.

Claims

P a t e n t C l a i m s
1. Drive joint for transmission of rotary motion between a drive unit and a propeller shaft with a propeller for propulsion of a boat, the drive joint (1) comprising a flexible joint (3) which is enclosed by a housing (2) and is designed to sustain thrust forces from the propeller during operations, characterized in that an attachment ring (16) is attached to an exit shaft (4) of the joint (1), said attachment ring (16) is provided at the inner or free end of the shaft (4) and is dimensioned in order to sustain pulling forces from the propeller during operations, said housing (2) is provided with an opening (17) above the inner end of the exit shaft (4) for direct access to the locking ring (16) during assembly and disassembly of the drive joint.
2. Drive joint according to claim 1, characterized in that the locking ring (16) is a seeger ring.
3. Use of a drive joint having a flexible joint for transmission of rotary motion for drive joint between a gear box and a propeller shaft on board a boat, the drive joint being constructed for sustaining both pull and push thrust forces from the propeller during operations.
EP08868708A 2008-01-03 2008-12-15 Drive joints and use of said drive joint Withdrawn EP2229316A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20080040A NO329187B1 (en) 2008-01-03 2008-01-03 Drive joints and application thereof
PCT/NO2008/000448 WO2009084965A1 (en) 2008-01-03 2008-12-15 Drive joints and use of said drive joint

Publications (1)

Publication Number Publication Date
EP2229316A1 true EP2229316A1 (en) 2010-09-22

Family

ID=40824530

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08868708A Withdrawn EP2229316A1 (en) 2008-01-03 2008-12-15 Drive joints and use of said drive joint

Country Status (5)

Country Link
US (1) US20100317245A1 (en)
EP (1) EP2229316A1 (en)
CA (1) CA2711049A1 (en)
NO (1) NO329187B1 (en)
WO (1) WO2009084965A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO336639B1 (en) * 2013-04-23 2015-10-12 Rolls Royce Marine As Assembly with hollow shaft

Family Cites Families (11)

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Publication number Priority date Publication date Assignee Title
GB1072144A (en) * 1965-03-24 1967-06-14 Birfield Eng Ltd Improvements in or relating to universal joints
DE1244491B (en) * 1965-06-10 1967-07-13 Loehr & Bromkamp Gmbh Fixed constant velocity joint coupling
CA854936A (en) * 1967-05-30 1970-11-03 P. Croset Louis Universal joints
GB1343282A (en) * 1970-02-04 1974-01-10 Gkn Transmissions Ltd Constant velocity ratio universal joints
JPS51119447A (en) * 1975-03-18 1976-10-20 Nissan Motor Co Ltd Slidable uniformity velocity universal joint
DE19513905C1 (en) * 1995-04-12 1996-06-20 Gkn Automotive Ag Connection for drive element on shaft
DE19701857C2 (en) * 1997-01-21 2001-09-06 Oetiker Hans Maschinen Slotted mounting ring
JP3291483B2 (en) * 1999-08-31 2002-06-10 株式会社▲高▼澤製作所 Universal joints for ship propeller shafts
US6971958B2 (en) * 2004-03-26 2005-12-06 Gkn Driveline North America, Inc. Apparatus and method for attachment and torque transfer for a constant velocity joint
DE502005010536D1 (en) * 2005-09-23 2010-12-23 Gkn Driveline Int Gmbh OPTIMIZED EQUIVALENT SLIP WITH CROP-FREE BALLETS
DE102006058860A1 (en) * 2006-12-13 2008-07-10 Volkswagen Ag Fixed constant velocity joint

Non-Patent Citations (1)

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Title
See references of WO2009084965A1 *

Also Published As

Publication number Publication date
NO20080040L (en) 2009-07-06
US20100317245A1 (en) 2010-12-16
NO329187B1 (en) 2010-09-06
WO2009084965A1 (en) 2009-07-09
CA2711049A1 (en) 2009-07-09

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