GB2152618A - Inner race member for a swashplate mechanism - Google Patents
Inner race member for a swashplate mechanism Download PDFInfo
- Publication number
- GB2152618A GB2152618A GB08500652A GB8500652A GB2152618A GB 2152618 A GB2152618 A GB 2152618A GB 08500652 A GB08500652 A GB 08500652A GB 8500652 A GB8500652 A GB 8500652A GB 2152618 A GB2152618 A GB 2152618A
- Authority
- GB
- United Kingdom
- Prior art keywords
- inner race
- race member
- hub
- ball
- member according
- 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
- 230000007246 mechanism Effects 0.000 title claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 10
- 229920000642 polymer Polymers 0.000 claims description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 abstract 1
- 238000005266 casting Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000002787 reinforcement 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
- F16C35/073—Fixing them on the shaft or housing with interposition of an element between shaft and inner 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
- F16H—GEARING
- F16H23/00—Wobble-plate gearings; Oblique-crank gearings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
- Forging (AREA)
- Transmission Devices (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
An inner race member 1 for a swashplate mechanism is formed by moulding a hub 3 of injection- mouldable or castable material around the inner portions of an inner race 2 of a deep-groove ball bearing with the race 2 positioned obliquely to the axis of the hub 3. The race 2 is preferably formed with grooves and recesses 6 and 7 and or roughened surfaces to key with the hub. <IMAGE>
Description
SPECIFICATION
Inner race member for a swashplate mechanism
This invention relates to an inner race member for a swashplate mechanism, the inner race member having on its outer surface a ball groove which extends obliquely to the longitudinal axis of the inner race member. The swashplate mechanism also comprises an outer race surrounding the inner race and having a ball groove formed in its bore, and a ring of balls rolling in the grooves of the two races.
Swashplate mechanisms of this kind are used where a rotary movement is to be converted to a reciprocating movement, as is the case, for example, with hammer drills, pad saws and ink distributor rollers. The inner race, which is made by the removal of material from a blank in the known constructions, requires considerable expense for manufacture, not least because of the machining of the ball groove obliquely to the longitudinal axis of the inner race. The object of the invention is to provide an inner race member for a swashplate mechanism of this kind, which can be produced with high precision, particularly in respect of the machining of the ball groove, with minimum production expenditure.
To this end, according to the invention, an inner race member for a swashplate mechanism is characterised in that a ball bearing inner race is embedded in an appropriately inclined position in a hub formed or injectionmoulded or cast material to leave the ball groove exposed. There is no difficulty in making the ball bearing inner race used in these conditions, because the ball groove can extend in a plane situated at right angles to the longitudinal axis of the ball bearing inner race, and can therefore be a commercial deepgroove ball bearing inner race. The inner race then only has to be supported in a mould for the hub in the required inclined position.
Advantageously this is done by placing it in an appropriate mould opening in which the hub embedding the race is then moulded by the introduction of injection-mouldable or castable material. The hub may consist of a polymer or a metallic material. While the hub is preferably produced by injection moulding in the case of a polymer, a hub consisting of a metallic material is preferably formed by die casting.
Advantageously, the ball bearing inner race has grooves formed at its two end faces, the injection-mouldable or castable material engaging therein. Consequently, the inner race always remains securely connected to the hub even in the event of shrinkage of the hub material.
In order satisfactorily to prevent relative rotation between the hub and the inner race under all conditions, the inner race may have at least one projection or recess to co-operate and key with the hub material as a positive connection. instead of a single projection or a single recess, the inner race bore may, for example, be knurled or milled.
To enable the' swashplate mechanism inner race memer to be coupled to a shaft, the hub may have a projection or a reces at one axial end to co-operate with corresponding coupling parts on the shaft.
According to a variant of the invention, the hub is made from a polymer and a metal reinforcing bush is additionally provided in its bore. The bush may either be inserted subsequently, in which case it engages around the end faces of the hub by means of radially outwardly extending flanges, which are bent over to form the flanges after insertion. Alternatively, a reinforcing bush of this kind can be inserted in the injection or casting mould and can be directly surrounded by the hub material by injection mouiding or casting.
Two embodiments of the invention are shown in longitudinal section in the accompanying drawings by way of example and will now be described in more detail.
The swashplate mechanism shown in Figure
1 comprises an inner race member 1 formed by a ball-bearing inner race 2, which is embedded in the hub 3, which is made of a polymer. The inner race member 1 is surrounded by an outer race 4, between which and the ball bearing inner race 2 roll balls 5.
The inner race 2 is formed with grooves 6 at its two end faces, the polymer of the hub 3 engaging in the said grooves.
The inner race 2 is also formed with a recess 7 in the form of a blind bore at one point of the periphery, the polymer of the hub 3 again engaging in this recess, thus preventing any relative rotation between the inner race 2 and the hub 3.
At the left-hand end the hub 3 has a recess 8 to form a coupling with a shaft extending through the bore 9 in the hub 3.
Figure 2 illustrates a variant of the inner race member 1. The bore of the inner race 2 is knurled at 10 to prevent relative rotation. A metal reinforcing bush 11 is also inserted into the bore 9 of the hub 3 and engages around the end faces of the hub 3 by radially outwardly extending flanges 1 2. In this case the hub 3 is provided with a projection 1 3 to form a coupling to a shaft, the projection 1 3 being additionally covered by the reinforcing bush 11 for reinforcement thereof.
The invention is not restricted to cases in which the inner race 2 has a cylindrical bore extending concentrically to the ball track. For example, the bore of the inner race 2 may, be so inclined as to be in alignment with the bore of the hub 3.
Claims (9)
1. An inner race member for a swashplate mechanism having on its outer surface a ball groove which extends obliquely to its longitudinal axis such swashplate mechanism further comprising an outer race surrounding the ball groove of the inner race member anr having a ball groove in its bore and a ring of balls disposed to roll in the ball grooves, the inner race member being characterised in that a ball bearing inner race is embedded in an appropriately inclined position in a hub formed of injection-moulded or cast material to leave the ball groove exposed.
2. An inner race member according to claim 1 wherein the ball bearing inner race is a commercial deep-groove ball bearing inner race.
3. An inner race member according to claim 1 or 2, wherein the ball bearing inner race has grooves formed in its two end faces, the injection-mouldable or castable material engaging therein.
4. An inner race member according to any of claims 1 to 3, wherein the ball bearing inner race has at least one projection or recess in order to prevent rotation relative to the hub.
5. An inner race member according to any of claims 1 to 4, wherein the hub has a projection or recess at one axial end for coupling to a shaft.
6. An inner race member according to any of claims 1 to 5, wherein the hub is made of a polymer and has a metal reinforcing bush in its bore.
7. An inner race member according to claim 6, wherein the reinforcing bush engages around the end faces of the hub by radially outwardly extending flanges.
8. An inner race member substantially as described with reference to Fig. 1 or Fig. 2 of the drawings.
9. A swashsplate mechanism, comprising an inner race member according any of the previous claims, an outer race surrounding the ball groove of the inner race member and having a ball groove in its bore and a ring of balls disposed to roll in the said ball grooves.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3400631 | 1984-01-11 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8500652D0 GB8500652D0 (en) | 1985-02-13 |
| GB2152618A true GB2152618A (en) | 1985-08-07 |
| GB2152618B GB2152618B (en) | 1986-10-29 |
Family
ID=6224622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08500652A Expired GB2152618B (en) | 1984-01-11 | 1985-01-10 | Inner race member for a swashplate mechanism |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS60159459A (en) |
| FR (1) | FR2557938B1 (en) |
| GB (1) | GB2152618B (en) |
| IT (1) | IT1181914B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007058550A1 (en) * | 2005-11-18 | 2007-05-24 | Keylock Bearings Limited | Improvements in and relating to bearings and process for producing the same |
| CN103717337A (en) * | 2011-09-15 | 2014-04-09 | 日立工机株式会社 | Reciprocating tool |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1153684C (en) | 1999-01-25 | 2004-06-16 | 3M创新有限公司 | Method of applying adhesive coated film |
| US9855732B2 (en) | 1999-01-25 | 2018-01-02 | 3M Innovative Properties Company | Method of applying adhesive coated film |
| JP2006189568A (en) * | 2005-01-05 | 2006-07-20 | Fuji Xerox Co Ltd | Image forming apparatus and hollow carrying roll |
| US8778122B2 (en) | 2006-06-29 | 2014-07-15 | 3M Innovative Properties Company | Adhering graphic films on irregular substrates |
| DE102015212215B4 (en) * | 2015-06-30 | 2020-04-23 | Aktiebolaget Skf | Bearing arrangement for the rotatable arrangement of a component with respect to a component and bearings with an inner bearing ring |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH114551A (en) * | 1924-04-16 | 1926-04-01 | Wichert Hulsebos | Tumbling disc with eccentric bearings arranged at an angle on a shaft to drive the shaft or the disc. |
| CH285891A (en) * | 1950-11-09 | 1952-09-30 | Meyer & Cie O | Wobble body drive. |
| AT292396B (en) * | 1969-10-10 | 1971-08-25 | Camillo Krejci | Adapter or clamping sleeve |
| CH558897A (en) * | 1973-05-30 | 1975-02-14 | Buss Ag | Screw feeder drive for rotary and axial movement - offers simple construction and low wear |
| EP0015740B1 (en) * | 1979-03-09 | 1983-04-27 | Skf (U.K.) Limited | End cap assemblies for conveyor rollers |
-
1984
- 1984-12-11 IT IT23981/84A patent/IT1181914B/en active
-
1985
- 1985-01-04 FR FR858500063A patent/FR2557938B1/en not_active Expired
- 1985-01-10 GB GB08500652A patent/GB2152618B/en not_active Expired
- 1985-01-10 JP JP60001569A patent/JPS60159459A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007058550A1 (en) * | 2005-11-18 | 2007-05-24 | Keylock Bearings Limited | Improvements in and relating to bearings and process for producing the same |
| CN103717337A (en) * | 2011-09-15 | 2014-04-09 | 日立工机株式会社 | Reciprocating tool |
| CN103717337B (en) * | 2011-09-15 | 2016-04-13 | 日立工机株式会社 | Reciprocating tool |
| US9415453B2 (en) | 2011-09-15 | 2016-08-16 | Hitachi Koki Co., Ltd. | Reciprocating tool |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2557938A1 (en) | 1985-07-12 |
| IT1181914B (en) | 1987-09-30 |
| GB2152618B (en) | 1986-10-29 |
| JPS60159459A (en) | 1985-08-20 |
| IT8423981A0 (en) | 1984-12-11 |
| IT8423981A1 (en) | 1986-06-11 |
| GB8500652D0 (en) | 1985-02-13 |
| FR2557938B1 (en) | 1989-02-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |