GB2193267A - Thrust bearings - Google Patents
Thrust bearings Download PDFInfo
- Publication number
- GB2193267A GB2193267A GB08712626A GB8712626A GB2193267A GB 2193267 A GB2193267 A GB 2193267A GB 08712626 A GB08712626 A GB 08712626A GB 8712626 A GB8712626 A GB 8712626A GB 2193267 A GB2193267 A GB 2193267A
- Authority
- GB
- United Kingdom
- Prior art keywords
- thrust
- bearing
- thrust bearing
- locating
- recess
- 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.)
- Granted
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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C43/00—Assembling bearings
- F16C43/02—Assembling sliding-contact bearings
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/04—Sliding-contact bearings for exclusively rotary movement for axial load only
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/08—Attachment of brasses, bushes or linings to the bearing housing
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/10—Sliding-contact bearings for exclusively rotary movement for both radial and axial load
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
- F16C2226/30—Material joints
- F16C2226/36—Material joints by welding
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2360/00—Engines or pumps
- F16C2360/22—Internal combustion engines
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2360/00—Engines or pumps
- F16C2360/44—Centrifugal pumps
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C9/00—Bearings for crankshafts or connecting-rods; Attachment of connecting-rods
- F16C9/02—Crankshaft bearings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding-Contact Bearings (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Description
SPECIFICATION
Bearings
The present invention relates to bearings and particularly to the retention and location of thrust bearings of the type used, for example, in internal combustion engines and compressors.
It is known to locate and retain thrust washer type bearings in a rebate or recess machined into the crankcase or bearing cap of an engine for example.
In some engine constructions, however, there is no provision for the machining of a rebate in which to locate and retain a thrust bearing. Such engines often employ what are known as flanged bearings wherein the journal and thrust bearing elements are of unitary construction. Flanged bearings are difficult and costly to produce and are also not particularly amenable to installation in an engine by automated assembly methods. European patent 0184693 of common inventorship herewith discloses bearings which overcome the problems of cost and difficulty of manufacture of flanged bearings. In the present case, however, where there is no provision for location and retention of the thrust bearing elements in the engine bearing housing some engine manufacturers are concerned lest the thrust bearings become detached from the journal bearings.
The present invention provides a thrust bearing which is independently located and thus may be used as a separate element or which provides additional security if combined with a combined journal and thrust bearing as in EP 0184693.
According to the present invention a thrust bearing comprises a substantially planar thrust accepting bearing member having at least one locating portion substantially at a right angle to the thrust accepting member and which portion co-operates with a recess in a bearing housing, the recess being adapted to receive the at least one locating portion.
In a preferred embodiment of the present invention there are two locating portions substantially at right angles to the planar member one portion being at each extremity of the thrust bearing. The locating portions may be formed by bending over of an extension to a blank formed from B strip of bearing material.
The bearing material may be any known in the art such as, for example, leaded-bronze, whitemetal, aluminium alloy. The bearing material may furthermore be applied to a strong backing material such as, for example, steel or a copper based alloy.
By suitable shaping of the locating portions and their co-operating recesses in the bearing housing mechanical interference may be obtained to prevent accidental displacement of the thrust bearing during engine assembly.
In order that the present invention may be more fully understood examples will now be described by way of illustration only with reference to the accompanying drawings of which:
Figure 1 shows a section in elevation of a bearing and housing assembly utilising thrust bearings according to the present invention;
Figure 2 shows a perspective view of a thrust bearing according to the present invention;
Figure 3 shows a plan view of the assembly of Fig. 1 but without a bearing cap member;
Figures 4(a) to (d) show alternative geometries of locating portions and co-operating recesses of thrust bearings according to the present invention;
Figure 5 shows part of a composite bearing comprising a journal bearing element and a thrust bearing element according to the present invention; and
Figure 6 which shows a section through Fig.
5 on the line AA' looking in the direction of the arrows.
Referring now to Figs. 1, 2 and 3 and where corresponding features are denoted by common reference numerals.
A bearing housing and bearing is denoted generally at 10. The assembly comprises a journal bearing housing 11 in a crankcase 12 and a journal bearing housing 13 in a cap member 14. Bearing journal liners 15 and 16 are fitted into the housings 11 and 13. Thrust washers 17 accept axial thrust loads imposed by a shaft 18 (not shown). The thrust washers 1 7 comprise a generally semi-circular portion 19 and tab portions 20 which are bent over from a flat blank. The washers 17 are blanked from flat strip having a steel backing and a lining of bearing material. Oil drain grooves 21 are provided by removal of the lining material. The tab portions 20 locate in recesses 22 which are machined into the flat split line of the bearing housing. In this case the recesses 22 are produced by end-milling the crankcase 12.The recesses 22 may, however, be formed in the cap member 14 or partially in the crankcase 12 and partially in the cap 14. The thrust washers 17 are retained in place by the cap member 14 and the thrust faces of the crankshaft 18 (not shown).
Figs. 4(a) to (d) show a recess 22 of reentrant form in plan view. Alternative tab portion shapes 20 are shown which lock by virtue of the mechanical interference between the recess 22 and tab 20. Any suitable alternative recess shape may be used as may any tab shape and the examples are by no means comprehensive. The circular recess 22 is shown since it is the easiest shape to form by, for example, end-milling. It will be appreciated that the examples of Fig. 4 provide thrust washers which will not easily be accidentally dislodged and which are amenable to robotic assembly.
Figs. 5 and 6 show a composite bearing 30, symmetrical about the lines AA' and BB' and comprising a journal bearing element 31 and a thrust bearing element 32. The thrust bearing 32 is joined to the journal bearing 31 by tags 33 formed from the steel backing 34 of the thrust bearing 32. The bearing lining 35 and part of the steel backing 34 is machined away as are portions 36 in order to enhance the flexibility of the tags 33. The thrust bearing 32 is connected to the journal bearing 31 by projection welds 37 on the journal bearing end face 38 which is specially profiled to a relatively fine edge. At the extremities of the thrust bearing 32 are tab portions 39 which fit into and co-operate with recesses 40 in the crankcase 41. The tabs 39 are prevented from moving by a cap member 42 bolted in position. By means of the tabs 39 and recesses 40 the thrust bearing is permanently maintained in position even if the welds 37 should fracture.
In the examples given above the tab portions have been formed by bending over of the end portions of the thrust washer blank.
The tabs may be formed by, for example, welding on of separate pieces.
Thrust bearings according to the present invention may be used on one or both sides of a bearing housing as appropriate according to the engine or compressor design.
Claims (7)
1. A thrust bearing comprising a substantially planar thrust accepting bearing member having at least one locating portion substantially at a right angle to the thrust accepting member and which portion co-operates with a recess in a bearing housing, the recess being adapted to receive the at least one locating portion.
2. A thrust bearing according to Claim 1 and wherein there are two locating portions and co-operating recesses.
3. A thrust bearing according to either
Claim 1 or Claim 2 wherein the locating portions are formed by bending from a blank.
4. A thrust bearing according to either
Claim 1 or Claim 2 wherein the locating portions are formed by attaching separate pieces to the planar thrust accepting member.
5. A thrust bearing according to any one preceding claim wherein the locating portions are formed with re-entrant geometry with respect to their co-operating recesses.
6. A bearing assembly comprising a thrust bearing according to any one preceding claim and having a journal bearing attached thereto.
7. A thrust bearing substantially as hereinbefore described with reference to the accompanying drawings and specification.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8712626A GB2193267B (en) | 1986-06-03 | 1987-05-29 | Bearings |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB868613411A GB8613411D0 (en) | 1986-06-03 | 1986-06-03 | Bearings |
GB8712626A GB2193267B (en) | 1986-06-03 | 1987-05-29 | Bearings |
Publications (3)
Publication Number | Publication Date |
---|---|
GB8712626D0 GB8712626D0 (en) | 1987-07-01 |
GB2193267A true GB2193267A (en) | 1988-02-03 |
GB2193267B GB2193267B (en) | 1989-12-20 |
Family
ID=26290847
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8712626A Expired GB2193267B (en) | 1986-06-03 | 1987-05-29 | Bearings |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2193267B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2508915A (en) * | 2012-12-14 | 2014-06-18 | Mahle Int Gmbh | A thrust washer for a sliding bearing |
GB2508914A (en) * | 2012-12-14 | 2014-06-18 | Mahle Int Gmbh | A thrust washer for a sliding bearing |
-
1987
- 1987-05-29 GB GB8712626A patent/GB2193267B/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2508915A (en) * | 2012-12-14 | 2014-06-18 | Mahle Int Gmbh | A thrust washer for a sliding bearing |
GB2508914A (en) * | 2012-12-14 | 2014-06-18 | Mahle Int Gmbh | A thrust washer for a sliding bearing |
Also Published As
Publication number | Publication date |
---|---|
GB8712626D0 (en) | 1987-07-01 |
GB2193267B (en) | 1989-12-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
PCNP | Patent ceased through non-payment of renewal fee |