GB2136920A - Power-take-off drive arrangement - Google Patents

Power-take-off drive arrangement Download PDF

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Publication number
GB2136920A
GB2136920A GB08405835A GB8405835A GB2136920A GB 2136920 A GB2136920 A GB 2136920A GB 08405835 A GB08405835 A GB 08405835A GB 8405835 A GB8405835 A GB 8405835A GB 2136920 A GB2136920 A GB 2136920A
Authority
GB
United Kingdom
Prior art keywords
segments
hubbed
driving wheel
drive
take
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Withdrawn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
GB08405835A
Other versions
GB8405835D0 (en
Inventor
Fred Stansfield
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.)
RAMSEY SILENT CHAIN Co LI
Original Assignee
RAMSEY SILENT CHAIN Co LI
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
Priority claimed from GB838308331A external-priority patent/GB8308331D0/en
Application filed by RAMSEY SILENT CHAIN Co LI filed Critical RAMSEY SILENT CHAIN Co LI
Priority to GB08405835A priority Critical patent/GB2136920A/en
Publication of GB8405835D0 publication Critical patent/GB8405835D0/en
Publication of GB2136920A publication Critical patent/GB2136920A/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Withdrawn legal-status Critical Current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
    • 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
    • F16D1/09—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 radial clamping due to axial loading of at least one pair of conical surfaces
    • F16D1/093—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 radial clamping due to axial loading of at least one pair of conical surfaces using one or more elastic segmented conical rings forming at least one of the conical surfaces, the rings being expanded or contracted to effect clamping
    • F16D1/095—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 radial clamping due to axial loading of at least one pair of conical surfaces using one or more elastic segmented conical rings forming at least one of the conical surfaces, the rings being expanded or contracted to effect clamping with clamping effected by ring contraction only
    • F16D1/096—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 radial clamping due to axial loading of at least one pair of conical surfaces using one or more elastic segmented conical rings forming at least one of the conical surfaces, the rings being expanded or contracted to effect clamping with clamping effected by ring contraction only the ring or rings being located between the shaft and the hub
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63J—AUXILIARIES ON VESSELS
    • B63J3/00—Driving of auxiliaries
    • B63J3/02—Driving of auxiliaries from propulsion power plant

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Gears, Cams (AREA)

Abstract

In a power-take-off drive arrangement including a driving wheel connected on a drive shaft, so that the drive arrangement can be very easily connected, for example, to the main propulsion shaft of a ship, the arrangement includes an externally tapered sleeve assembly (10) and a driving wheel assembly (18), the sleeve assembly being made in at least two segments (14, 16) and the driving wheel assembly being constituted by a hubbed portion and an encircling ring portion, the hubbed portion being made in two segments (24, 26) and the ring portion being made in two segments (28, 30). <IMAGE>

Description

SPECIFICATION Power-take-off drive arrangement The invention relates to power-take-off drive arrangements.
There are various instances where it is necessary to be able to take power from an existing drive shaft without first having to dismantle the drive for the sliding along the shaft from one end of a drive gear or sprocket or the like. A particular example of this is the main propulsion shaft of a ship which cannot be dismantled until the ship is in dry dock, and even then such work would be a major undertaking.
In the past it has been usual to operate the main engine of a ship on heavy fuel oil and to generate power for the various auxiliary systems by means of diesel generator sets using marine diesel oil. In this way the auxiliary systems have been wholly independent of the operation of the main engine. However, recent increases in oil prices have made the reduction of overall fuel costs a major requirement in the economic operation of ships, and since the cost of marine diesel fuel has risen far more than that of heavy fuel oil it has become apparent that savings can be effected by running at least some of the auxiliary systems from the main engine, at least while the ship is at sea. Consequently, the object of the invention is to provide a power-take-off drive arrangement which, for example, can be very easily connected to the main propulsion shaft of a ship.
According to the invention, there is provided a power-take-off drive arrangement including a sleeve assembly and a driving wheel assembly, the sleeve assembly being externally tapered and made in at least two segments so that it can be assembled around a drive shaft of a particular diameter for which it is intended, and the driving wheel assembly being constituted by a hubbed portion and encircling ring portion surrounding the hub of the hubbed portion, the hubbed portion having an internal taper matching the taper of the sleeve assembly and being made in two diametrically opposed segments, the encircling ring portion of the driving wheel assembly also being made in two diametrically opposed segments but the mating surfaces of said segments being angularly offset with respect to the mating surfaces of the segments of the hubbed portion, a series of bolts being provided for clamping the segments of the hubbed portion to the segments of the encircling ring portion, and means being provided for urging the driving wheel assembly axially relative to the sleeve assembly to tightly clamp the latter on the drive shaft, and to tightly clamp the hubbed portion on the sleeve assembly. The series of bolts which clamp the segments of the hubbed portion to the segments of the encircling ring portion will preferably constitute the drive means for the transmission of torque from the ring portion to the hubbed portion.
The peripheries of the hubbed portion and of the ring portion of the driving wheel assembly may be provided with sprocket teeth for transmitting drive to respective endless chains but may be adapted for power transmission by other means.
In order that the invention may be fully understood and readily carried into effect, the same will now be described, by way of example only, with reference to the accompanying drawings, of which: Figure 1 is an exploded view of the component parts of a power-take-off drive arrangement embodying the invention, Figure 2 is a part-sectional side view of the assembled drive arrangem8nt and Figure 3 is-a diagrammatic view which will presently be referred to.
Referring now to Figures 1 and 2 of the drawings, the power-take-off drive arrangement there illustrated is intended for connection to the main propulsion shaft of a ship so that the required drive to some auxiliary system can be effected in a very short time, typically only a few hours, when the ship is in harbour rather than when the ship is in dry dock. The drive arrangement includes a sleeve assembly, generally indicated 10, and a drive wheel assembly generally indicated 12.
The sleeve assembly 10 is externally tapered.
as shown, and is made in two segments 14 and 1 6 so that it can be assembled around the particular drive shaft for which it has been made.
The driving wheel assembly is constituted by a hubbed portion 18 and a ring portion 20 surrounding the hub 22 of the hubbed portion. As shown, the peripheries of the hubbed portion and of the ring portion are provided with sprocket teeth 1 9 for transmitting drive to respective endless chains.
The hubbed portion 18 of the driving wheel assembly has an internal taper matching the taper of the sleeve assembly and is made in two diametrically opposed segments 24 and 26. The encircling ring portion of the driving wheel assembly is also made in two diametrically opposed segments 28 and 30 but the mating surfaces of the segments 28 and 30 are angularly offset with respect to the mating surfaces of the segments 24 and 26 of the hubbed portion, the angular offset being a right angle.
A series of bolts 32 and respective nuts 34 are provided for clamping the segments of the hubbed portion to the segments of the encircling ring portion, the heads of the bolts and the nuts being located at the bottom of respective counterbores 36.
Means are provided for urging the driving wheel assembly 1 2 axially relative to the sleeve assembly 10 to tightly clamp the latter on the drive shaft, these means including a series of studs 38 which are tightly screwed into threaded holes in end faces of the segments 24 and 26 of the hubbed portion.Said studs project freely through clearance holes in a flange portion 40 of the sleeve assembly and are provided with socalled hydraulic nuts 42 (these being hydraulic jacking devices customarily operated at a working pressure in excess of 10,0001bus per square inch), the arrangement being such that the hydraulic nuts can all be hydraulically connected together and operated simultaneously so that a considerable force can be applied to urge the driving wheel assembly along the sleeve assembly, the force being equally distributed around the respective components.
Referring now to Figure 3, there is there illustrated an arrangment whereby, when required, a force can be produced in the reverse direction, that is to slide the driving wheel assembly 12 axially relative to the sleeve assembly 10 to slacken the latter from the drive shaft concerned.
In this arrangment a split ring 44 has been secured to the sleeve assembly 10 by means of a series of bolts 46 and the hydraulic nuts 42 have been reversed so that they can be operated to produce a compressive force in the studs 38.
It is thought that the power-take-off drive arrangement described above will be ideal for establishing an auxiliary drive from the main propulsion shaft of a ship, although of course there may well be other instances where the drive arrangement will be useful. Various modifications may of course be made. For example, the sleeve assembly may be made-in more than two segments. It will also be understood that other means may be provided for urging the driving wheel assembly axially relative to the sleeve assembly. The peripheries of the hubbed portion and of the encircling ring portion need not necessarily be provided with sprocket teeth for transmitting the drive; they could be adapted for power transmission by other means, for example by means of V-belts. The various components of the drive arrangement may be constructed in various ways, that is to say for example by being constructed as steel fabrications or by being of cast construction. It will also be understood that the length of the hub portion of the arrangement may be made shorter than the outside rim portion in order to reduce weight.

Claims (4)

1. A power-take-off drive arrangement including a sleeve assembly and a driving wheel assembly, the sleeve assembly being externally tapered and made in at least two segments so that it can be assembied around a drive shaft of a particular diameter for which it is intended, and the driving wheel assembly being constituted by a hubbed portion and an encircling ring portion surrounding the hub of the hubbed portion, the hubbed portion having an internal taper matching the taper of the sleeve assembly and being made in two diametrically opposed segments, the encircling ring portion of the driving wheel assembly also being made in two diametrically opposed segments but the mating surfaces of said segments being angularly offset with respect to the mating surfaces of the segments of the hubbed portion, a series of bolts being provided for clamping the segments of the hubbed portion to the segments of the encircling ring portion, and means being provided for urging the driving wheel assembly axially relative to the sleeve assembly to tightly clamp the latter on the drive shaft, and to tightly clamp the hubbed~portion on the sleeve assembly.
2. A power-take-off drive arrangement according to claim 1, in which the series of bolts which clamp the segments of the hubbed portion to the segments of the encircling ring portion constitute the drive means for the transmission of toque from the ring portion to the hubbed portion.
3. A power-take-off drive arrangement according to either one of the preceding claims, in which the peripheries of the hubbed portion and of the ring portion of the driving wheel assembly are provided with sprocket teeth for transmitting drive to respective endless chains.
4. A power-take-off drive arrangement constructed and arranged, and adapted to be assembled around a drive shaft, substantially as hereinbefore described, with reference to and as illustrated by the accompanying drawings.
GB08405835A 1983-03-25 1984-03-06 Power-take-off drive arrangement Withdrawn GB2136920A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08405835A GB2136920A (en) 1983-03-25 1984-03-06 Power-take-off drive arrangement

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB838308331A GB8308331D0 (en) 1983-03-25 1983-03-25 Power-take-off drive arrangement
GB08405835A GB2136920A (en) 1983-03-25 1984-03-06 Power-take-off drive arrangement

Publications (2)

Publication Number Publication Date
GB8405835D0 GB8405835D0 (en) 1984-04-11
GB2136920A true GB2136920A (en) 1984-09-26

Family

ID=26285625

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08405835A Withdrawn GB2136920A (en) 1983-03-25 1984-03-06 Power-take-off drive arrangement

Country Status (1)

Country Link
GB (1) GB2136920A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008006489A1 (en) * 2008-01-29 2009-07-30 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Clamping element for force-fit torque-proof clamping of cylindrical shaft section of drive shaft in motor vehicle, has clamping element clamping inner ring against shaft section and comprises two half shells

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB334044A (en) * 1929-08-12 1930-08-28 Charles Antony Ablett Improvements in or relating to split ball bearings
GB742712A (en) * 1952-11-17 1956-01-04 Charles Henry Rogan Junior An improvement in or relating to the securing of pulleys on shafts

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB334044A (en) * 1929-08-12 1930-08-28 Charles Antony Ablett Improvements in or relating to split ball bearings
GB742712A (en) * 1952-11-17 1956-01-04 Charles Henry Rogan Junior An improvement in or relating to the securing of pulleys on shafts

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008006489A1 (en) * 2008-01-29 2009-07-30 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Clamping element for force-fit torque-proof clamping of cylindrical shaft section of drive shaft in motor vehicle, has clamping element clamping inner ring against shaft section and comprises two half shells

Also Published As

Publication number Publication date
GB8405835D0 (en) 1984-04-11

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)