GB2207216A - A shaft connector - Google Patents

A shaft connector Download PDF

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Publication number
GB2207216A
GB2207216A GB08706826A GB8706826A GB2207216A GB 2207216 A GB2207216 A GB 2207216A GB 08706826 A GB08706826 A GB 08706826A GB 8706826 A GB8706826 A GB 8706826A GB 2207216 A GB2207216 A GB 2207216A
Authority
GB
United Kingdom
Prior art keywords
component
shaft
bore
connector according
connector
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Withdrawn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
GB08706826A
Other versions
GB8706826D0 (en
Inventor
Keith Skinner
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.)
WRAXALL ENGINEERING PRODUCTS L
Original Assignee
WRAXALL ENGINEERING PRODUCTS L
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 WRAXALL ENGINEERING PRODUCTS L filed Critical WRAXALL ENGINEERING PRODUCTS L
Priority to GB08706826A priority Critical patent/GB2207216A/en
Publication of GB8706826D0 publication Critical patent/GB8706826D0/en
Publication of GB2207216A publication Critical patent/GB2207216A/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Withdrawn legal-status Critical Current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

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)

Abstract

The connector comprises a plastics body 4 having a frusto conical outer surface 6 and an axial bore 12. The body is formed with a plurality of axial slots 14 which extend for part of the length of the body and a slot 18 which extends for the full length of the body. The body can be frictionally fastened between a shaft 200 and a complementary shaped bore formed in a component by press fitting the body into the component bore to produce a wedge fit. <IMAGE>

Description

A SHAFT CONNECTOR This invention relates to a shaft connector for use in fastening components such as gears, machine parts, etc.
onto a shaft, and more especially to a shaft connector for use in office and business machines.
Previously shaft connectors have included precision machined sleeve-like elements or collets. The elements are made of metal and have a tapered body provided with a threaded portion at one end. The tapered body mates with a bore of a component such as a gear. The tapered body has an internal axial bore for engaging a shaft. The tapered body includes longitudinally extending slots for enabling the shaft connector to be compressed. The compression of the shaft connector onto the shaft is provided by a nut threaded onto the threaded portion of the body and by the tapered body being wedged by the action of threading into the bore of the component to fasten the component to the shaft. One disadvantage of such a shaft connector is that precision machining is involved making it expensive to produce and an object of the invention is to provide an improved shaft connector.
According to one aspect of the invention there is provided a shaft connector for use in fastening a component onto a shaft, the shaft connector comprising a frusto conical shaped body provided with at least one longitudinal slot for fastening onto a component, the body having a longitudinal internal bore for fastening onto a shaft, the shaft connector being made of a plastics material and being compressible and expandable to enable frictional fastening of the shaft connector onto the shaft and press fitting of the body into a bore of the component for fastening the component onto the shaft.
Such frictional fastening of the component onto the shaft by the connector holds the component fast with the shaft in a an axial and rotational sense.
Another disadvantage of earlier shaft couplings is that when the components are interconnected, the wedging effect makes the connector difficult to release for removal or repositioning.
To reduce that disadvantage the shaft connector may have means such as a shoulder or groove on the body for enabling the shaft connector to be removed from engagement with the component or shaft by a suitable tool for example a screw driver. Where a shoulder is provided it may be defined by a circumferential flange.
According to another aspect of the invention there is provided a connector for fastening a component to a shaft comprising a frusto conical shaped body having an outer surface for frictionally engaging a bore in the component and an axial bore for frictionally engaging the shaft, the body being a press fit in said bore of the component whereby the body will be retained frictionally in the component bore, and said body having removal means at its larger end for receiving a body removal tool.
The body may extend into a threaded portion to enable further compression of the shaft connector by application of a nut to the threaded portion.
Suitably the body is provided with a roughened external surface for gripping into the bore of the component which may be similarly roughened.
The body may be provided with circumerfential wedge shaped teeth for locking the shaft connector into a bore of the component. The bore may have complementary shaped grooves to the teeth on the body.
Desirably the shaft connector is made from a polycarbonate polymer or other suitable plastics material.
Suitably the shaft connector is for use under low torque conditions for example in the range of up to 15 lbs ft for a 381l ( 9. (9.53mm)shaft diameter.
According to a further aspect of the invention there is provided a shaft and a component drivably interconnected frictionally by a shaft according to any of the nine immediately preceding paragraphs.
Embodiments of the invention will now be described by way of example only and with reference to the accompanying drawings in which: Figure 1 is a longitudinal cross sectional elevation of a first embodiment of the shaft connector according to the invention including illustrating fastening of a component onto a shaft Figure 2 is an end view of the first embodiment shown in Figure 1; Figure 3 is a longitudinal cross-sectional elevation of a second embodiment of the shaft connector according to the invention; Figure 4 is a longitudinal cross-sectional elevation of the second embodiment together with a modification; Figure 5 is a longitudinal cross-sectional elevation of a further modification to the second eabodiment; and Fig.6 is a modification of the embodiment shown in Fig.5.
With reference to Figures 1 and 2 of the accompanying drawings there is shown the first embodiment of the shaft connector 2 for fastening a component 100 onto a shaft 200. The shaft connector 2 has a frustro conical shaped body 4 for mating with the component 100. The body 4 has an external surface 6 which diverges from an end face 8 to an end face 10. The external surface 6 being capable of mating with a range of bore sizes of the component 100. Axially extending within the body 4 is a bore 12 for receiving and fastening onto the shaft 200. The surface 6 has three incomplete slots 14 which extend axially along the periphery of the surface 6. The slots 14 penetrate into the bore 12 and extend from the face 10 to stop short at a region 16 adjacent the face 8.The slots 14 are spaced at 90" intervals with a space of 1800 between the first and the third slot 14. The surface 6 also has a complete slot 18 positioned at 90" between the first and third slots 14.
The number of slots can be varied according to the diametrical size of the connector.
The shaft connector 2 is made of a plastics material for example, a polycarbonate, and is compressible and expandable in use. The shaft connector 2 may be injection moulded.
In operation the axial bore 12 is received onto the suitably dimensioned shaft 200 and frictionally fastened by a press fit onto the shaft. Such frictional fastening is facilitated by the wedging action of the connector between the component and the shaft. The wedging action retains the component 100 both axially and circumferentially on the shaft 200.
With reference to Figures 3 of the accompanying drawings there is shown the second embodiment of the shaft connector. For clarity, Figure 3 is numbered using the same system as Figures 1 and 2 wih identical numbers differentiated with an apostrophe ""' indicating equivalent features.
The shaft connector 2' has a frusto conical shaped body 4' for mating with the component 100'. The body 4' has an external surface 6' which diverges from an end face 8' to an end face 10'. The external surface 6' is capable of mating with a range of bore sizes of the component 100'. Axially extending within the body 4' is a bore 12' for receiving and fastening onto the shaft 200'. The surface 6' has three incomplete slots 14' which extend axially along the periphery of the surface 6'.
The slots 14' penetrate into the bore 12' and extend from the face 10' to stop short at a region 16' adjacent the face 8'.
The slots 14' are spaced at 900 intervals with a space of 1800 between the first and third slot 14'. The surface 6' also has a complete slot 18' positioned at 90" between the first and third slots 14'. Again, the number of slots can vary with the diameter of the connector.
The body 4' of the shaft connector 2' is provided with a circumferential groove 20 adjacent the face 10' for enabling the shaft connector 2' to be removed from engagement with the component or shaft by a suitable tool 300, for example, a screw driver. Alternatively a flange 40 can be formed adjacent from 10' to enable a removal force to be exerted by the tool.
The shaft connector 2' is made of a plastics material for example a polycarbonate, and is compressible and expandable in use. The shaft connector 2' may be injection moulded.
In operation the shaft connector 2' is identical to that described in a preceding paragraph for the first embodiment excepting that the shaft connector 2' may be removed from fastening the component 100' to the shaft 200' by inserting the tool 300 into the groove 20 or behind the flange 40 to extract the shaft connector 2' from engagement with the component 100'.
With reference to Figure 4 of the accompanying drawings there is shown the second embodiment of the shaft connector 2 ' together with a modification. For clarity Figure 4 is numbered using the same system as Figure 2.
The body portion 4' is formed with a screw threaded extension 22 as shown. The thread is preferably square sectioned and extends beyond the region 16' to include the slots 14', 18'. The threaded extension 22 mates with a nut (not shown) to enable further compression of the shaft connector 2'.
The shaft connectors 2 and 2' may have the surface 6, 6' roughened on the periphery to facilitate gripping of the shaft connector 2, 2' into the bore of the component 100,100'.
The bore of the component 100, 100' may also be similarly roughened. The connector of Fig.3 may be further modified as shown in Figure 5. The shaft connector 2' may be provided with wedge shaped 24 teeth on the surface 6'. The teeth 24 extend circumferentially and act as a means for inhibiting movement of the connector to the left as viewed in Fig.5.
However the additional grip achieved can be overcome by the removal tool. Alternatively the teeth 24 may be engageable with complementary shaped grooves in the bore of the component 100' as shown in Fig.6. The wedge shaped teeth 24 enable the shaft connector 2' to be locked into the bore of the component 100 to effect permanent fixing.
It should be understood that the shaft connectors 2, 2' and the modifications applicable thereto are generally for use under low torque conditions for example in the range of up to 15 lbs ft for a -" (9.53mm) shaft diameter but it is envisaged that the connector may be used in higher torque applications, The modifications shown in Figs.4,5 and 6 may be applied to the connector shown in Fig.l.

Claims (17)

  1. A A connector for use ln fattening a component onto a shaft, the connector comprising a frusto conical shaped body having an outer surface for engagement with the component, a longitudinal inner bore for engagement with the shaft and at least one longitudinal slot, the body being formed from plastics material and being compressible to permit frictional fastening of the body onto the shaft by press fitting the body into a bore in the component.
  2. 2. A connector according to Claim 1 in which the body is arranged to hold the component fast with the shaft in an axial and rotational sense.
  3. 3. A connector according to Claim 1 or 2 in which removal means is provided on the body for enabling the body to be removed from engagement with the component or shaft.
  4. 4. A connector for fastening a component to a shaft comprising a frusto conical shaped body having an outer surface for frictionally engaging a bore in the component and an axial bore for frictionally engaging the shaft, the body being a prcss fit in said bore of the component whereby the body will be retained frictionally in the component bore, and said body having a removal means at its larger end for receiving a body removal tool.
  5. 5. A connector according to Claims 3 or 4 in which the removal means is a shoulder on the body.
  6. 6. A connector according to Claim 5 in which the shoulder is defined by a circumferential flange.
  7. 7. A connector according to Claims 3, 4, 5 or 6 in which the removal means is a groove on the body.
  8. 8. A connector according to any preceding Claim in which the body includes a threaded portion to enable further compression of the connector by the application of a nut to the threaded portion.
  9. 9. A connector according to Claim 8 in which the threaded portion extends from a smaller diameter end of the body.
  10. 10. A connector according to any preceding Claim in which the body has a roughened outer surface for gripping the bore of tho component.
  11. 11. A connector according to any preceding Claim in which the body is provided with circumferential wedge-shape teeth for locking the body into the bore of the component.
  12. 12. A connector according to any preceding Claim in which the bore of the1 component is of complementary shape to the outer surface of the body
  13. 13. A connector according to any preceding Claim in which the body is formed with a plurality of longitudinal sloths.
  14. 14. A connector according to any preceding Claim in which the or one of the slots extends axially for the full length of the body.
  15. 15. A connector according to any preceding Claim in which the body is formed from a polycarbonate polymer material.
  16. 16. A connector according to any preceding Claim drivably interconnecting by friction a shaft and a component.
  17. 17. A connector constructed and arranged substantially as described herein with reference to the accompanying drawings.
GB08706826A 1987-03-23 1987-03-23 A shaft connector Withdrawn GB2207216A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08706826A GB2207216A (en) 1987-03-23 1987-03-23 A shaft connector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08706826A GB2207216A (en) 1987-03-23 1987-03-23 A shaft connector

Publications (2)

Publication Number Publication Date
GB8706826D0 GB8706826D0 (en) 1987-04-29
GB2207216A true GB2207216A (en) 1989-01-25

Family

ID=10614443

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08706826A Withdrawn GB2207216A (en) 1987-03-23 1987-03-23 A shaft connector

Country Status (1)

Country Link
GB (1) GB2207216A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001077539A1 (en) * 2000-04-06 2001-10-18 Custom Machine & Tool Co., Inc. Concentric drive method and apparatus
US6568063B1 (en) 1999-04-09 2003-05-27 Custom Machine & Tool Co., Inc. Concentric drive method and apparatus
EP2066910A1 (en) * 2006-09-29 2009-06-10 ITT Manufacturing Enterprises Inc. A device for interconnecting a first element and a second element as well as a pump comprising such a device
US20130092074A1 (en) * 2011-10-14 2013-04-18 Annie Larouche Safety flag for a watercraft

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB706999A (en) * 1951-07-17 1954-04-07 Walter Siegerist Improvement in mounting for sheaves and the like
GB1045943A (en) * 1964-06-09 1966-10-19 Philips Electronic Associated Improvements in or relating to operating knobs
GB1390025A (en) * 1971-04-07 1975-04-09 Wellman Bibby Co Ltd Shaft mountings for pulleys sprockets coupling flanges and other machine elements
GB1452216A (en) * 1973-02-09 1976-10-13 Borg Warner Arrangement for securing a machine element to a shaft
GB1475060A (en) * 1975-01-29 1977-06-01 Reliance Electric Co Device for mounting a pillow block and bearing assembly on a rotatable shaft
EP0137759A2 (en) * 1983-09-23 1985-04-17 The British Petroleum Company p.l.c. Energy storage flywheels

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB706999A (en) * 1951-07-17 1954-04-07 Walter Siegerist Improvement in mounting for sheaves and the like
GB1045943A (en) * 1964-06-09 1966-10-19 Philips Electronic Associated Improvements in or relating to operating knobs
GB1390025A (en) * 1971-04-07 1975-04-09 Wellman Bibby Co Ltd Shaft mountings for pulleys sprockets coupling flanges and other machine elements
GB1452216A (en) * 1973-02-09 1976-10-13 Borg Warner Arrangement for securing a machine element to a shaft
GB1475060A (en) * 1975-01-29 1977-06-01 Reliance Electric Co Device for mounting a pillow block and bearing assembly on a rotatable shaft
EP0137759A2 (en) * 1983-09-23 1985-04-17 The British Petroleum Company p.l.c. Energy storage flywheels

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6568063B1 (en) 1999-04-09 2003-05-27 Custom Machine & Tool Co., Inc. Concentric drive method and apparatus
WO2001077539A1 (en) * 2000-04-06 2001-10-18 Custom Machine & Tool Co., Inc. Concentric drive method and apparatus
US8814463B2 (en) 2006-09-20 2014-08-26 Xylem Ip Holdings Llc Device for interconnecting a first element and a second element as well as a pump comprising such a device
EP2066910A1 (en) * 2006-09-29 2009-06-10 ITT Manufacturing Enterprises Inc. A device for interconnecting a first element and a second element as well as a pump comprising such a device
EP2066910A4 (en) * 2006-09-29 2014-03-12 Xylem Ip Holdings Llc A device for interconnecting a first element and a second element as well as a pump comprising such a device
US20130092074A1 (en) * 2011-10-14 2013-04-18 Annie Larouche Safety flag for a watercraft
US9216802B2 (en) * 2011-10-14 2015-12-22 Pelican International Inc. Safety flag for a watercraft

Also Published As

Publication number Publication date
GB8706826D0 (en) 1987-04-29

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