GB2199381A - Seal installation - Google Patents

Seal installation Download PDF

Info

Publication number
GB2199381A
GB2199381A GB08630708A GB8630708A GB2199381A GB 2199381 A GB2199381 A GB 2199381A GB 08630708 A GB08630708 A GB 08630708A GB 8630708 A GB8630708 A GB 8630708A GB 2199381 A GB2199381 A GB 2199381A
Authority
GB
United Kingdom
Prior art keywords
tool
seal
gap
storage
seals
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Withdrawn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
GB08630708A
Other versions
GB8630708D0 (en
Inventor
Trevor Gordon Curtis
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.)
Ford Motor Co
Original Assignee
Ford Motor Co
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 Ford Motor Co filed Critical Ford Motor Co
Priority to GB08630708A priority Critical patent/GB2199381A/en
Publication of GB8630708D0 publication Critical patent/GB8630708D0/en
Priority to ES87308817T priority patent/ES2018271B3/en
Priority to DE8787308817T priority patent/DE3764784D1/en
Priority to EP87308817A priority patent/EP0272775B1/en
Priority to JP62326642A priority patent/JPS63232984A/en
Publication of GB2199381A publication Critical patent/GB2199381A/en
Priority to US07/416,759 priority patent/US5013050A/en
Priority to US07/617,308 priority patent/US5052695A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/0028—Tools for removing or installing seals
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3268—Mounting of sealing rings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49895—Associating parts by use of aligning means [e.g., use of a drift pin or a "fixture"]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53657—Means to assemble or disassemble to apply or remove a resilient article [e.g., tube, sleeve, etc.]

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing With Elastic Sealing Lips (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)

Description

e 2 19938 1 Seal Installation This invention relates to the installation
of seals in gaps between adjacent components. The invention is particularly concerned with placing annular seals in annular gaps between a stationary part and a rotating part. Typical of such seals are oil seals around rotating shafts in internal combustion engines.
Seals of this type are delicate and need to be carefully handled for transport and storage purposes. They should not be distorted or deformed before they are put into place. It has been known for some time to store such seals on cylindrical supports which support the internal periphery of the seal, in order to avoid damage to this part of the seal before it is fitted.
When the seal is to be fitted, a special tool is required 15 and this tool has to be the correct size to suit the seal and to suit the gap into which the seal is to be f itted. The tool also has to expand the seal to enable it to be inserted into the gap. Thus, if there is a requirement to fit seals of virious different sizes, a number of different dedicated tools will be required. Furthermore, because it is often necessary to insert the seal fully into a gap between two components, it is often a requirement that the tool should be capable of entering the gap. If the tool has been damaged in any way, for example by having been dropped on the floor, it may be unusable.
According to the present invention, there is provided a storage and application too-1 for seals, the tool comprising a first cylindrical region for supporting a seal around its inner periphery during transport and storage and adapted to enter a gap in which the seal is to be fitted, and a second part adapted to have a force applied to it to bring the seal into the correct position with its outer periphery engaging the outer of the components, the tool being adapted to be withdrawn once the seal has been correctly located.
The tool is constructed so that the friction between the first region and the inner periphery of the seal is less than the friction between the outer periphery of the seal and the outer component, so that the seal stays in place whilst the tool is withdrawn.
The tool is preferably adapted to be a one-use tool which is discarded after use. The tool can therefore be of a plastics material.
The tool is preferably also adapted to determine the depth at which the seal is located in the gap, and the tool may have an annular flange which abuts against the surface of the outer or inner component in order to limit the depth of insertion.
The seal may be secured to the tool for transport and storage by adhesive which will provide a bond sufficiently strong to hold the seal in place, but weak enough to be ruptured when the tool is withdrawn from the gap leaving the seal in place.
Alternatively, the seal may be lubricated with a suitable grease or other lubricant when it is placed on the tool, and the presence of this lubricant can hold the seal in place. Correct lubrication of the seal on installation is very important, and this pre- lubrication of the seal can make it possible to dispense with the application of further lubricant at the time of installation, and thus also to ensure that the correct lubricant is used.
The necessary force to position the seal within the gap can be applied either by a direct thrust applied to the WI t z tool, in which case the tool will have a head suitable for receiving the necessary hammer impacts, or by tightening a bolt threaded into a bore in one of the components, in which case the tool can have a hole through which the bolt extends as it is being tightened.
The invention will now be further described, by way of example, with reference to the accompanying drawing, in which:
Figure 1 is a cross section through a tool in accordance with the invention, showing the tool in use in fitting a seal; and Figure 2 is an enlarged view of the area within the circle A from Figure 1.
Figure 1 shows an annular oil seal 10 being fitted in the 15 gap 12 between a rotatable shaft 14 and a fixed housing 16. The seal 10 isapplied by a tool 18. The tool is of a simple shape, as can be seen in Figure 1 and is conveniently a plastics moulding of low cost so that it can be discarded once the seal 10 has been fitted.
in Figure 2, the seal 10 is shown in cross section on a larger scale. The outer part 20 of the seal is p rimarily of metal and is intended to be an interference fit with the inner diameter of the housing 16. Although this part of the seal is predominantly of metal, it may have a rubber coating.
The inner part 22 of the seal is predominantly of rubber, although it may have a metal carriery and has a sealing lip 24 which is adapted to make sealing contact with the external circumference of the rotating shaft 14. An annular spring 26 in the form of a wire ring supports the lip 24 to ensure that proper sealing.. contact is maintained. Some seals are constructed without this spring.
The tool 18 has a head 28, an anular flange 30 and a cylindrical support region 32. The support region 32 surrounds a hollow cylindrical cavity 34.
In use, the seal 10 is fitted onto the support region 32. It should be noted that the relative positions of the seal and the tool in Figure 2 are not as they will be in practice, the seal being shown out of contact with the sleeve for clarity of illustration. In practice, the seal will be stressed when it is in place on the support region 32, because the outer diameter of this region inevitably has a greater circumference than the outer surface of the shaft 14 against which the seal will ultimately operate. A step 36 on the tool will have a diameter slightly smaller than the outer diameter of the outer part 20 of the seal and slightly smaller than the inner diameter of the housing 16, to enable the tool to enter the gap 12 with the seal.
The tool and the seal are assembled to the relative positions shown at the time of manufacture. The support region 32 supports the seal while it is being stored and transported. This ensures that the seal does not accidently become distorted and that the sealing lip 24 does not get damaged.
A seal of this type will always be accurately related to the gap which it has to fill, ie either the gap will be dimensioned to accept a standard size of seal or the seal will be designed to operate in a specific gap. The tool 18 will have to follow the same criteria, and be designed for each particular application.
To apply the seal to the gap 12 between the components 14 and 16, the tool bearing the seal is offered up to the gap and is pressed into the gap. It will be noted that the k I r c ti leading end of the support region 32 is chamfered at 38 to facilitate entry. As the tool is pushed home, the outer region 20 of the seal will come into contact with the inner surface of the bore in the housing 16 and will fit tightly Against it. The tool is driven home until the flange 30 lies flush against the outer face of the housing 16, and in this way the depth of the shoulder 36 will determine the position at which the seal is located in the gap. Clearly this shoulder can be altered in size in accordance with the desired end position of the seal.
Once the tool has been driven fully home, it is then necessary to remove it, while leaving the seal in place. The seal is normally held in place on the tool by the friction between the lip 24 and the support region 32.
However once the seal has been properly located, the friction between the outer region 20 of the seal and the housing 16 will be greater than that between the lip 24 and the support 32, so that the tool can be withdrawn. It may be necessary to incorporate on the head 28 of the tool some gripping formation which will allow a tool to be connected to the head to help withdrawal.
In order to ensure that the seal remains on the support region 32 during transport and storage, it may be useful to apply a small quantity of adhesive as indicated by reference numeral 40, between the seal and the tool. This adhesive would be of a low-tack character so that the adhesive bond would be ruptured on withdrawing the tool.
The use of a disposable tool in this way can substantially reduce assembly times for the seal in the gap, and this reduction considerably outweighs the slight extra cost of providing a throwaway tool 18 with each seal.
other advantages resulting from the use of a tool as described are as follows:
i) mounting the seal on the tool before transportation and storage of the seal reduces the risks of damage to the lip 24 of the seal; ii) if the seal is pre-lubricated, one can be certain that the correct lubricant is used; iii) the provision of a tool with each seal ensures that the correct tool is always used; iv) the need for each workshop to hold a wide range of dedicated tools is avoided; v) fitting of the seal is no longer a skilled operation; and vi) the seal will be f itted on the tool under controlled, dirt-free conditions.
1

Claims (11)

Claims.
1. A storage and application tool for seals, the tool comprising a first cylindrical region for supporting a seal around its inner periphery during transport and storage and adapted to enter a gap in which the seal is to be fitted, and a second part adapted to have a force applied to it to bring the seal into the correct position with its outer periphery engaging the outer of the components, the tool being adapted to be withdrawn once the seal has been correctly located.
2. A tool as claimed in Claim 1, which is adapted to be a one-use tool which is discarded after use.
3. A tool as claimed in Claim 1 or Claim 2 and made of a plastics material.
4. A tool as claimed in any preceding claim adapted to determine the depth at which the seal is located in the gap, wherein the tool has an annular flange which abuts against the surface of the outer or inner component in order to limit the depth of insertion.
5. A tool as claimed in any preceding claim, wherein the necessary force to position the seal within the gap is to be applied by a direct thrust applied to the tool, and the tool has a head suitable for receiving the necessary hammer impacts.
6. A tool as claimed in any one of Claims 1 to 4, wherein the necessary force to position the seal within the gap is to be applied by tightening a bolt threaded into a bore in one of the components, and the tool has a hole through which the bolt extends as it is being tightened.
7. In combination, a tool as claimed in any preceding claim with an annular seal fitted on it.
8. A combination as claimed in Claim 7, wherein the seal is coated with a lubricant.
9. A combination as claimed in Claim 7, wherein the seal is secured to the tool for transport and storage by adhesive which will provide a bond sufficiently strong to hold the seal in place, but weak enough to be ruptured when the tool is withdrawn from the gap leaving the seal in place.
10. A storage and application tool for seals, substantially as herein described with reference to the accompanying drawing.
11. The combination of a storage and application tool for seals with a seal, substantially as herein described with reference to the accompanying drawing.
1 Published 1988 at The Patent Office. State House. 6671 High Holborn. London WCIR 4TP Further copies may be obtained from 7he Patent Offce. Sales Branch. St Mary Cray, CrpingLon, Kent BR5 3FLD Printed by Multaplex techniques JuL St Mary Cray, Kent Con. 1/87.
GB08630708A 1986-12-23 1986-12-23 Seal installation Withdrawn GB2199381A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
GB08630708A GB2199381A (en) 1986-12-23 1986-12-23 Seal installation
ES87308817T ES2018271B3 (en) 1986-12-23 1987-09-22 SEAL INSTALLATION.
DE8787308817T DE3764784D1 (en) 1986-12-23 1987-09-22 INSTALLING SEALS.
EP87308817A EP0272775B1 (en) 1986-12-23 1987-09-22 Seal installation
JP62326642A JPS63232984A (en) 1986-12-23 1987-12-23 Storage and mounting tool for seal
US07/416,759 US5013050A (en) 1986-12-23 1989-10-03 Seal installation
US07/617,308 US5052695A (en) 1986-12-23 1990-11-19 Seal installation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08630708A GB2199381A (en) 1986-12-23 1986-12-23 Seal installation

Publications (2)

Publication Number Publication Date
GB8630708D0 GB8630708D0 (en) 1987-02-04
GB2199381A true GB2199381A (en) 1988-07-06

Family

ID=10609479

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08630708A Withdrawn GB2199381A (en) 1986-12-23 1986-12-23 Seal installation

Country Status (6)

Country Link
US (2) US5013050A (en)
EP (1) EP0272775B1 (en)
JP (1) JPS63232984A (en)
DE (1) DE3764784D1 (en)
ES (1) ES2018271B3 (en)
GB (1) GB2199381A (en)

Cited By (3)

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GB2226091A (en) * 1988-11-16 1990-06-20 Kaco Gmbh Seal ring
GB2343488A (en) * 1998-11-06 2000-05-10 Bosch Gmbh Robert Lip seal arrangement
CN103831775A (en) * 2013-12-26 2014-06-04 合肥华集汽车部件有限公司 Installation tool of elastic seal ring

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2226091A (en) * 1988-11-16 1990-06-20 Kaco Gmbh Seal ring
GB2343488A (en) * 1998-11-06 2000-05-10 Bosch Gmbh Robert Lip seal arrangement
GB2343488B (en) * 1998-11-06 2000-12-27 Bosch Gmbh Robert Sealing arrangement
CN103831775A (en) * 2013-12-26 2014-06-04 合肥华集汽车部件有限公司 Installation tool of elastic seal ring

Also Published As

Publication number Publication date
US5013050A (en) 1991-05-07
EP0272775A2 (en) 1988-06-29
US5052695A (en) 1991-10-01
GB8630708D0 (en) 1987-02-04
ES2018271B3 (en) 1991-04-01
DE3764784D1 (en) 1990-10-11
JPS63232984A (en) 1988-09-28
EP0272775A3 (en) 1989-06-07
EP0272775B1 (en) 1990-09-05

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