GB2095769A - A combination of a housing, a fastening member and a bearing outer race ring - Google Patents
A combination of a housing, a fastening member and a bearing outer race ring Download PDFInfo
- Publication number
- GB2095769A GB2095769A GB8204116A GB8204116A GB2095769A GB 2095769 A GB2095769 A GB 2095769A GB 8204116 A GB8204116 A GB 8204116A GB 8204116 A GB8204116 A GB 8204116A GB 2095769 A GB2095769 A GB 2095769A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fastening member
- projection
- outer race
- race ring
- housing
- 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
- 229910000831 Steel Inorganic materials 0.000 abstract description 10
- 239000010959 steel Substances 0.000 abstract description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 8
- 239000004411 aluminium Substances 0.000 abstract description 7
- 229910052782 aluminium Inorganic materials 0.000 abstract description 7
- 238000010276 construction Methods 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
- F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
- F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
- F16C35/07—Fixing them on the shaft or housing with interposition of an element
- F16C35/077—Fixing them on the shaft or housing with interposition of an element between housing and outer race ring
-
- 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
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/52—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
- F16C19/525—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions related to temperature and heat, e.g. insulation
-
- 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
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
- F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
-
- 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
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
- F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
- F16C19/36—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with a single row of rollers
- F16C19/364—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with a single row of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mounting Of Bearings Or Others (AREA)
- Rolling Contact Bearings (AREA)
Abstract
A prior art bearing outer race ring of steel fitted in a bore of a housing of aluminium will become loose as a result of thermal expansion. To prevent the above a fastening member (16) of steel has a bore into which a projection (14) of the housing of aluminium (15) extends as an interference fit. The bearing outer race ring of steel (12) is also held as an interference fit in a second bore of the fastening member (16). Expansion of the projection (14) due to heat causes it to more firmly engage the fastening member. <IMAGE>
Description
SPECIFICATION
A combination of a housing, a fastening member and a bearing outer race ring
This invention relates to the fastening of a bearing with respect to a housing using a fastening member.
In the manufacture of vehicles, for example, motor cars, particular attention is paid to keeping the weight of the vehicle to a minimum. For example, the rear axle housing or the vehicle engine housing may be made of a light metal such as aluminium or aluminium alloy, but a bearing mounted in the housing is usually of steel with the outer race ring held as an interference fit in the bore of an annular projection of the housing at room temperature. The coefficient of thermal expansion of aluminium is greater than that of steel so that when there is a temperature increase a gap foms between the bearing outer race ring and the bore of the annular projection of the housing. This can result in rotational or axial movement of the bearing with respect to the housing leading to increased wear and premature failure of the bearing and of components mounted by the bearing.
The problem is thus to provide a construction in which a bearing outer race ring is held fast with respect to an annular projection of a housing, the coefficient of thermal expansion of the bearing outer race ring being less than that of the projection of the housing, and in which the bearing outer race ring does not become loose with increasing temperature.
The invention provides a combination of a housing having an annular projection, a fastening member having a bore into which the projection extends as an interference fit at room temperature, and a bearing outer race ring held in a bore of the fastening member by an interference fit at room temperature, the coefficients of thermal expansion of the fastening member and the bearing outer race ring being substantially the same and less than that of the projection of the housing.
The fastening member is preferably made from steel and, with the bearing outer race ring made from steel, the two will have substantially the same coefficient of thermal expansion allowing for the possibility of slightly different grades of steel being used.
As the temperature increases, the annular projection of the housing will expand more than the fastening member so that the projection will be held more securely in the bore of the fastening member and the bearing outer race ring will not become loose. The fastening member may include a radial flange locating the bearing outer race ring in one axial direction.
The fastening member may comprise an annular open channel with the two side walls of the channel extending axially and the bottom wall extending radially, the bearing outer race ring being seated in the bore of the radially inner side
wall and the projection being seated in the bore of i the radially outer side wall.
The fastening member may comprise a stepped
sleeve, and the bearing outer race rina mav be
seated in a smaller diameter bore of the sleeve
and the projection may be seated in a larger
diameter bore of the sleeve.
The axially free end of the projection may
contact a radially extending surface of the
fastening member. In a construction in which the
fastening member comprises an annular open
channel, the axially free end of the projection may
contact the radially extending bottom wall of the
channel; and in a construction in which the
fastening member comprises a stepped sleeve, the
axially free end of the projection may contact a
shoulder or step of the sleeve.
In a construction in which the fastening
member comprises an annular open channel with
the projection seated in the bore of the radially
outer side wall of the channel, the projection may
be rapidly spaced from the radially inner safe wall
of the channel.
Embodiments of the invention will now be
described by way of example, reference being
made to the accompanying drawings, of which:
Figure 1 shows in longitudinal section a
combination of part of a housing, a tapered roller
bearing and an annular open channel fastening
member; and
Figure 2 shows in longitudinal section a
combination of part of a housing, a ball bearing
and a stepped sleeve fastening member.
Figure 1 shows a tapered roller bearing 10,
comprising inner and outer race rings 11 and 12,
mounted on a shaft 13 with the inner race ring 11
abutting a shoulder of the shaft.
The bearing outer race ring 12 is held fast with
respect to an annular projection 14 of a light metal
housing 15 by means of a fastening member 16.
The fastening member 1 6 comprises an open
channel with two side walls 1 7 and 18 extending
axially and the bottom wall 19 extending radially.
The bearing outer race ring 12 is held as an
interference fit in the bore of the radially inner side
wall 1 7 at room temperature and the annular
projection 14 extends into and is held as an
interference fit in the bore of the radially outer side
wall 1 8 at room temperature.
A flange 20 extends radially inwardly from the
free end of the radially inner wall 1 7 and the
radially outer bearing race ring 12 abuts this
flange.
The axially free end of the annular projection 14
abuts the radially extending bottom wall 19 and
the projection is radially spaced from the radially
inner side wall 17.
Axial load is transmitted between the free end
of the annular projection 14 and the bottom wall
19, the radial flange 20 and the outer race ring 12,
and the inner race ring 11 and the shoulder of the
shaft 13.
In a construction in which the bearing 10 and
the fastening member 1 6 are made from steel, and the light metal housing 1 5 is made from aluminium, when the temperature of the housing increases the annular projection 14 expands radially more than the fastening member 1 6 and the bearing 10 because of the greater coefficient of thermal expansion of aluminium. This means that the annular projection 14 will engage more firmly in the bore of the radially outer side wall 18 so that the bearing will remain held fast with respect to the housing 1 5.
Figure 2 shows a shaft 21 mounted for rotation relative to a light metal housing 22 by means of a rolling bearing 23 and a fastening member 24.
The bearing 23 is mounted on the shaft 21 and is a deep groove ball bearing comprising radially inner and outer race rings 25 and 26, the inner race ring 25 abutting a shoulder of the shaft.
The fastening member 24 comprises a stepped sleeve having a smaller diameter bore portion 27, in which the bearing outer race ring 26 is held as an interference fit at room temperature, and a large diameter bore portion 28.
The housing 22 has an annular projection 29 which extends into the larger diameter bore portion 28 of the stepped sleeve 24 and is held there by an interference fit at room temperature.
The axially free end of the annular projection 29 abuts the step of the sleeve 24 from the larger to the smaller diameter bore portions 28 to 27 and abuts the outer race ring 26.
In a construction in which the bearing 23 and the fastening member 24 are made from steel, and the light metal housing 22 is made from aluminium, when the temperature of the housing increases the annular projection 29 will expand radially more than the fastening member 24 and the bearing 23 because of its greater coefficient of thermal expansion. Thus the annular projection 29 will engage more firmly in the larger diameter bore portion 28 of the sleeve 24 and the bearing 23 will remain held fast in the bore of the smaller diameter bore portion 27.
Claims (6)
1. A combination of a housing having an annular projection, a fastening member having a bore into which the projection extends as an interference fit at room temperature, and a bearing outer race ring held in a bore of the fastening member by an interference fit at room temperature, the coefficients of thermal expansion of the fastening member and the bearing outer race ring being substantially the same and less than that of the projection of the housing.
2. A combination as claimed in Claim 1, wherein the fastening member comprises an annular open channel with the two side walls of the channel extending axially and the bottom wall extending radially, the bearing outer race ring being seated in the bore of the radially inner side wall and the projection being seated in the bore of the radially outer side wall.
3. A combination as claimed in Claim 1, wherein the fastening member comprises a stepped sleeve, the bearing outer race ring being seated in a smaller diameter bore of the sleeve and the projection being seated in a larger diameter bore of the sleeve.
4. A combination as claimed in any preceding claim wherein the axially free end of the projection abuts a radially extending surface of the fastening member.
5. A combination as claimed in Claim 2, wherein the projection is radially spaced from the radially inner side wall of the channel.
6. A combination of a housing, fastening member and bearing outer race ring substantially as herein described with reference to and as shown in Figure 1 or with reference to and as shown in Figure 2 of the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3112754A DE3112754C2 (en) | 1981-03-31 | 1981-03-31 | Fixing of bearings |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2095769A true GB2095769A (en) | 1982-10-06 |
| GB2095769B GB2095769B (en) | 1984-08-01 |
Family
ID=6128840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8204116A Expired GB2095769B (en) | 1981-03-31 | 1982-02-12 | A combination of a housing a fastening member and a bearing outer race ring |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE3112754C2 (en) |
| FR (1) | FR2503294B1 (en) |
| GB (1) | GB2095769B (en) |
| IT (2) | IT8220530V0 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4473309A (en) * | 1981-11-28 | 1984-09-25 | Rolls-Royce Limited | Bearing assembly with thermal compensation |
| EP0441557A2 (en) * | 1990-02-05 | 1991-08-14 | Fujitsu Limited | Rotating support apparatus in disk storage device |
| EP1167787A3 (en) * | 2000-06-19 | 2003-01-22 | Minebea Kabushiki Kaisha | Bearing apparatus |
| FR3042239A1 (en) * | 2015-10-12 | 2017-04-14 | Skf Ab | BEARING BEARING DEVICE FOR MOTOR SHAFT |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19808566C1 (en) * | 1998-02-28 | 1999-07-15 | Daimler Chrysler Ag | Shaft bearing for axle drive of motor vehicle |
| DE20304989U1 (en) * | 2003-03-26 | 2004-08-05 | Ab Skf | Bearing mounting fixes has inner seating for bearing and outer seating for component which consist of cylindrical tubular sections whose wall thickness is less than radial spacing between two seatings |
| US8444323B2 (en) * | 2011-02-10 | 2013-05-21 | GM Global Technology Operations LLC | Bearing lock for a motor assembly |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1068516B (en) * | 1959-11-05 | |||
| DE596995C (en) * | 1931-04-22 | 1934-05-15 | Spontan Ab | Transverse bearing and device for resiliently holding the bearing in the housing |
| DE851575C (en) * | 1940-05-04 | 1952-10-06 | Riv Officine Di Villar Perosa | Rolling bearing installation in a material with a significantly higher coefficient of thermal expansion than that of the rolling bearing material |
| AT178768B (en) * | 1951-08-01 | 1954-06-10 | Elin Ag Elek Ind Wien | Insert ring for bearing body made of light metal |
| US2700581A (en) * | 1953-03-13 | 1955-01-25 | Aluminium Francais I | Precision fit for bearings and the like |
| DE1725127U (en) * | 1953-12-31 | 1956-06-28 | Skf Kugellagerfabriken Gmbh | ARRANGEMENT FOR COMPENSATING THE DIFFERENT THERMAL EXPANSION OF LIGHT ALLOY HOUSING AND THE ROLLER BEARING BUILT IN THEM. |
| FR2199372A5 (en) * | 1972-09-14 | 1974-04-05 | Bennes Marrel | |
| DE2427688C2 (en) * | 1974-06-07 | 1984-03-08 | Klöckner-Humboldt-Deutz AG, 5000 Köln | Storage of bearing outer rings or bearing shells in a light metal housing |
| CH619519A5 (en) * | 1977-10-17 | 1980-09-30 | Confederation Helvetique Repre |
-
1981
- 1981-03-31 DE DE3112754A patent/DE3112754C2/en not_active Expired
-
1982
- 1982-01-18 IT IT8220530U patent/IT8220530V0/en unknown
- 1982-01-18 IT IT19169/82A patent/IT1149475B/en active
- 1982-02-12 GB GB8204116A patent/GB2095769B/en not_active Expired
- 1982-03-30 FR FR8205450A patent/FR2503294B1/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4473309A (en) * | 1981-11-28 | 1984-09-25 | Rolls-Royce Limited | Bearing assembly with thermal compensation |
| EP0441557A2 (en) * | 1990-02-05 | 1991-08-14 | Fujitsu Limited | Rotating support apparatus in disk storage device |
| EP0441557A3 (en) * | 1990-02-05 | 1992-06-03 | Fujitsu Limited | Rotating support apparatus in disk storage device |
| EP1167787A3 (en) * | 2000-06-19 | 2003-01-22 | Minebea Kabushiki Kaisha | Bearing apparatus |
| FR3042239A1 (en) * | 2015-10-12 | 2017-04-14 | Skf Ab | BEARING BEARING DEVICE FOR MOTOR SHAFT |
Also Published As
| Publication number | Publication date |
|---|---|
| IT8219169A0 (en) | 1982-01-18 |
| IT8220530V0 (en) | 1982-01-18 |
| DE3112754A1 (en) | 1982-10-14 |
| FR2503294B1 (en) | 1988-10-14 |
| IT1149475B (en) | 1986-12-03 |
| GB2095769B (en) | 1984-08-01 |
| FR2503294A1 (en) | 1982-10-08 |
| DE3112754C2 (en) | 1983-11-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19930212 |