GB2110776A - Wedging-roller one-way clutch - Google Patents
Wedging-roller one-way clutch Download PDFInfo
- Publication number
- GB2110776A GB2110776A GB08233490A GB8233490A GB2110776A GB 2110776 A GB2110776 A GB 2110776A GB 08233490 A GB08233490 A GB 08233490A GB 8233490 A GB8233490 A GB 8233490A GB 2110776 A GB2110776 A GB 2110776A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tangs
- clutch device
- hub
- shaped
- tang
- 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- Withdrawn
Links
- 238000002485 combustion reaction Methods 0.000 claims abstract description 5
- 238000005452 bending Methods 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 3
- 238000010008 shearing Methods 0.000 claims description 2
- 238000007493 shaping process Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000004804 winding 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D41/00—Freewheels or freewheel clutches
- F16D41/06—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface
- F16D41/064—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls
- F16D41/066—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls all members having the same size and only one of the two surfaces being cylindrical
- F16D41/067—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls all members having the same size and only one of the two surfaces being cylindrical and the members being distributed by a separate cage encircling the axis of rotation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
- F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
- F02N15/022—Gearing between starting-engines and started engines; Engagement or disengagement thereof the starter comprising an intermediate clutch
- F02N15/023—Gearing between starting-engines and started engines; Engagement or disengagement thereof the starter comprising an intermediate clutch of the overrunning type
Abstract
A free wheel clutch device for a starting motor of an internal combustion engine, of the type comprising a plurality of axial rollers and spring elements for acting thereupon, arranged between axial ribs in a cup-shaped housing, is characterized in that the spring elements are provided by a plurality of shaped, resilient tangs 10 formed around the periphery of a generally plate-like element non-rotatably received within the cup-shaped housing. The free ends 10' of the tangs are wider than the rest of each tang and the tangs are either bent into a circle or an S-shape. <IMAGE>
Description
SPECIFICATION
Free wheel clutch device for the starting motor of an internal combustion engine
This invention relates to a free wheel clutch device for a starting motor of an internal combustion engine, such as is conventionally used in motor vehicles.
More particularly, the invention relates to such a free wheel clutch device of the type having a hub, providing a generally cupshaped housing, mounted on a splined portion of the rotational shaft of the starting motor, and a toothed pinion slidably mounted on said shaft for engagement with a ring gear of the heat engine, and wherein said hub and pinion can be coupled by means of a plurality of axial rollers and roller spring elements for acting on the rollers, arranged about the hub between axial ribs in the cup-shaped housing thereof.
As is well known, these clutch devices perform the function of enabling, on starting, the heat engine to be driven by the electric starting motor by coupling of said pinion with said ring gear, and then disengaging said parts once the heat engine has started.
However, during the starting step, when the rotational speed of the heat engine exceeds that of the electric motor, that is during "overrunning", the pinion will be driven by the ring gear as long as the ignition lock key is held at the starting position. During this step, the pinion disconnects from the hub driven by the electric motor so as to therefore disconnect said heat engine and electric motor. This operation is made possible owing to the provision of axial rollers, arranged between pinion and hub, under the action of spring elements.
In conventional clutch devices, the spring elements are springs of toroidal type there being as many springs as there are rollers. As a result, such prior art devices are quite expensive, not only because of the number of springs to be provided but also because of the time required to assemble said rollers and springs in said hub.
It is the object of the present invention to provide a clutch device of the above described type, but which substantially avoids the disadvantages which arise from the use of individual springs. In the clutch device of the invention there is used in place of individual springs a single element capable of assuring the required spring or resilient action on the rollers, whereby both the number of components and assembly time for the device can be reduced, to the benefit of production costs.
More particularly, the free wheel clutch device according to the invention is characterized in that the spring elements for the rollers are provided by a plurality of shaped, resilient tangs formed around the periphery of a generally plate-like element non-rotatably received within said cup-shaped housing of the hub.
In an advantageously simple embodiment, the tangs are loop-shaped with their free ends arranged for contact with the rollers.
The invention will now be described further with reference to the accompanying drawings, in which:
Figure 1 is a part sectional view of the starting motor-electromagnet unit on the control or drive side to show one embodiment of the clutch device according to the invention;
Figure 2 is an enlarged sectional view taken along line ll-ll of the clutch device shown in
Fig. 1;
Figure 3 is an enlarged plan view showing a first step in the formation of the resilient tangs around the periphery of the tang carrier plate;
Figure 4 is a plan view showing the plate of
Fig. 3 upon completion of the tang-forming operation;
Figure 5 is a side view of the plate shown in Fig. 4; and
Figure 6 is an enlarged, exploded view of the free wheel clutch device shown in Fig. 1.
In per se known manner, the starting unit shown in Fig. 1 comprises a starting motor 1, for a motor vehicle, which includes a D.C.
electric motor, and a dual winding electromagnet 2, energized by the vehicle driver through operation of the ignition lock key.
At an intermediate portion provided with a helical groove, the rotational shaft 3 of the starting motor has mounted thereon a hub 4, providing a cup-shaped housing 4'. At the control or drive end of the shaft 3 there is mounted a toothed pinion 5 for engagement with a ring gear 6 of the internal combustion engine or heat engine (not shown).
Due to the helical groove, or spline, said hub 4 is capable of axially moving on said shaft 3 under the control of a lever 7, pivoted about a fixed fulcrum 0 and connected at one end with the hub 4 and at the other end with the moving element or core 8 of electromagnet 2.
Pinion 5 is freely mounted on shaft 3 and in addition to being axially driven by hub 4, it is also rotatably connectabie to said member.
Rotary connection is between the untoothed portion 5' of the pinion and cup-shaped housing 4' of the hub and is provided by means of a free wheel clutch device according to the present invention.
As more clearly shown in Figs. 2, 4, 5 and 6, the illustrated free wheel clutch device includes a sheet metal plate 9 having shaped, resilient tangs 10 distributed around its circumference and axially projecting frdm the plate plane. The tangs 10 serve as spring elements for the rollers, and therefore correspond in number to the number of axial rollers 11 which are provided, as explained more fully below.
Plate 9 has an outer contour 9' matching with the inner contour of cup-shaped housing 4' of the hub, in which it is received to lie against the bottom of the cup-shaped housing.
More particularly, the inner contour of cupshaped housing 4' of the hub comprises axial ridges or ribs 4", enabling axial introduction of plate 9 into cup-shaped housing 4', but inhibiting any relative rotational movement therebetween. The ribs 4" define roller housings between said cup-shaped housing 4' and pinion 5', in each of which a roller 11 and its associated presser spring element ie resilient tang 10, are located, as best seen in Fig. 2.
In the embodiment shown, such rollers 11 are four in number, and likewise there are four resilient tangs 1 0. The tangs 10 are loopshaped, as seen in Figs. 5 and 6 and their free ends 10' resiliently act upon said rollers.
These free ends 10' are each of larger width than the length of the remaining portion of the tang, whereby to assure a correct contact with the roller.
Instead of the loop-shaped tangs shown, "S"-shaped tangs or tangs of other shapes can be used, provided of course that the tangs are capable of assuring a resilient pressure on rollers 11, when said plate 9 is mounted between pinion 5' and cup-shaped portion 4' of hub 4.
As will be appreciated, the plate 9 with its peripheral tangs 10 can be provided by a very simple and economical manufacturing process.
According to the preferred manufacturing process, first a thin metal sheet is provided, and then by a shearing operation the planar plate shown in Fig. 3 is obtained, that is a centrally drilled plate with outer contour 9', carrying tang elements 1 Oa with enlarged ends 1 0'a, still in the plane of the plate.
It will be seen that said planar tang elements 1 0a are of a pattern such that they extend substantially tangentially to plate 9, but with opposite development. In addition, in the case of an even number of tang elements, such elements are arranged in parallel pairs, as shown for the four tang elements illustrated.
Then, a foiding or bending operation is carried out on the tang elements 1 0a about a cylindrical punch of suitable diameter, so that the resulting tangs are loop-shaped and extend out of the plane of the plate on one side thereof, as shown in Figs. 4 and 5.
More especially, the tang elements are rolled about a punch parallel to the plate, so that on completion of this bending step the loops are at substantially 90' relative to the plate plane. Of course, the outer diameter of the punch will correspond to the desired inner diameter of the loop.
It is also evident that the rolling direction for the tangs is such as to bring their free ends 10' at the surface of rollers 11.
It will be seen from the foregoing that instead of a plurality of individual roller springs, as normally required, the invention contemplates the use of only one element, that is said plate 9 provided with resilient roller spring elements, such as loops 10. The assembling operations for the clutch device are also simpler and more expeditious, since the pieces to be assembled between cupshaped housing 4' and pinion 5' are only said rollers 11 and plate 9, which also enables the use of automatic assembling systems.
Claims (7)
1. A free wheel clutch device for a starting motor of an Internal combustion engine, of the type comprising a hub, providing a substantially cup-shaped housing, mounted on a splined portion of the rotational shaft for the starting motor and a toothed pinion slidably mounted on said shaft for engagement with a ring gear of the heat engine, and wherein said hub and pinion are connectable and disconnectable by means of a plurality of axial rollers and spring elements for acting thereupon. arranged between axial ribs in the cupshaped housing of the hub, characterized in that said spring elements are provided by a plurality of shaped, resilient tangs formed around the periphery of a generally piate-like element non-rotatably received within said cup-shaped housing of the hub.
2. A clutch device according to Claim 1, characterized in that said resilient tangs are each loop-shaped with the free end of the loop arranged for contact with one of said rollers.
3. A clutch device according to Claim 2, characterized in that said loop-shaped tangs each terminate with an end of larger length than the width of the remaining portion of the tang.
4. A clutch device according to Claim 1, characterized in that said tangs are of "S" shape.
5. A clutch device according to any of the preceding claims, characterized in that said plate-like element with said resilient tangs is formed from a metal sheet by a shearing operation providing tang elements, followed by a bending or shaping operation of the sheared tang elements to form said resilient tangs.
6. A clutch device according to Claims 1-3 and 5, characterized in that said bending operation consists of curving the sheared tang elements about a cylindrical punch parallel to the plane of the plate so that each of the tangs takes the configuration of a loop axially projecting from one side of the plate.
7. A clutch device substantially as hereinbefore described with reference to Figs. 1-8 of the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT25465/81A IT1139920B (en) | 1981-12-04 | 1981-12-04 | FREEWHEEL ENGINE STARTING DEVICE FOR INTERNAL COMBUSTION ENGINE, ESPECIALLY FOR MOTOR VEHICLES |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2110776A true GB2110776A (en) | 1983-06-22 |
Family
ID=11216780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08233490A Withdrawn GB2110776A (en) | 1981-12-04 | 1982-11-24 | Wedging-roller one-way clutch |
Country Status (6)
| Country | Link |
|---|---|
| AR (1) | AR229293A1 (en) |
| DE (1) | DE3244395A1 (en) |
| ES (1) | ES517854A0 (en) |
| FR (1) | FR2517750A1 (en) |
| GB (1) | GB2110776A (en) |
| IT (1) | IT1139920B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0212163A1 (en) * | 1985-08-01 | 1987-03-04 | INA Wälzlager Schaeffler KG | Free-wheel cage made of polymeric material |
| EP1469196A1 (en) | 2003-04-16 | 2004-10-20 | Ntn Corporation | Starter pulley with integral clutch |
| WO2007031131A2 (en) * | 2005-07-21 | 2007-03-22 | Schaeffler Kg | Sleeve-shaped or roller-shaped free-wheel with a cage for the pins or rollers |
| EP2299105A1 (en) * | 2009-09-02 | 2011-03-23 | Zen Sa Industria Metalurgica | Torque transmission system and free wheel with rollers and cage with integrated springs |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016004031A1 (en) * | 2016-04-02 | 2017-10-05 | Borgwarner Inc. | Freewheel and method for producing such a freewheel |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE885331C (en) * | 1948-10-02 | 1953-08-03 | Lorenz C Ag | Clamping roller or clamping ball freewheel clutch, preferably for small capacities, e.g. B. for magnetic recorders |
| US3294208A (en) * | 1964-09-16 | 1966-12-27 | Lamson & Sessions Co | One-way roller overrunning reversible clutch |
-
1981
- 1981-12-04 IT IT25465/81A patent/IT1139920B/en active
-
1982
- 1982-11-24 GB GB08233490A patent/GB2110776A/en not_active Withdrawn
- 1982-11-30 FR FR8220038A patent/FR2517750A1/en active Pending
- 1982-12-01 ES ES517854A patent/ES517854A0/en active Granted
- 1982-12-01 DE DE19823244395 patent/DE3244395A1/en not_active Withdrawn
- 1982-12-01 AR AR291456A patent/AR229293A1/en active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0212163A1 (en) * | 1985-08-01 | 1987-03-04 | INA Wälzlager Schaeffler KG | Free-wheel cage made of polymeric material |
| EP1469196A1 (en) | 2003-04-16 | 2004-10-20 | Ntn Corporation | Starter pulley with integral clutch |
| WO2007031131A2 (en) * | 2005-07-21 | 2007-03-22 | Schaeffler Kg | Sleeve-shaped or roller-shaped free-wheel with a cage for the pins or rollers |
| WO2007031131A3 (en) * | 2005-07-21 | 2007-05-18 | Schaeffler Kg | Sleeve-shaped or roller-shaped free-wheel with a cage for the pins or rollers |
| CN101228364B (en) * | 2005-07-21 | 2010-06-09 | 谢夫勒两合公司 | Sleeve/roller-shaped free-wheel with a cage for the pins or rollers |
| US7987957B2 (en) | 2005-07-21 | 2011-08-02 | Schaeffler Kg | Bushing-type roller overrunning clutch with a cage for needles or rollers |
| EP2299105A1 (en) * | 2009-09-02 | 2011-03-23 | Zen Sa Industria Metalurgica | Torque transmission system and free wheel with rollers and cage with integrated springs |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2517750A1 (en) | 1983-06-10 |
| ES8400808A1 (en) | 1983-11-16 |
| AR229293A1 (en) | 1983-07-15 |
| IT1139920B (en) | 1986-09-24 |
| DE3244395A1 (en) | 1983-06-09 |
| IT8125465A0 (en) | 1981-12-04 |
| ES517854A0 (en) | 1983-11-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |