CA2077703A1 - Splined machine part - Google Patents
Splined machine partInfo
- Publication number
- CA2077703A1 CA2077703A1 CA 2077703 CA2077703A CA2077703A1 CA 2077703 A1 CA2077703 A1 CA 2077703A1 CA 2077703 CA2077703 CA 2077703 CA 2077703 A CA2077703 A CA 2077703A CA 2077703 A1 CA2077703 A1 CA 2077703A1
- Authority
- CA
- Canada
- Prior art keywords
- shaft
- annulus
- throughbore
- groove
- splines
- 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.)
- Abandoned
Links
Landscapes
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
ABSTRACT
A machine part assembly comprised an annulus having an axially splined throughbore and an annular groove formed circumferentially around the interior of the throughbore. A shaft having a splined free end is slidably received in the throughbore so that the splines intermesh with each other and so that the end of the shaft overlies said groove. The shaft and the annulus are then fixedly secured to each other by deforming the end of the shaft radially outwardly so that a portion of the deformed shaft end enters and at least partially fills the groove.
A machine part assembly comprised an annulus having an axially splined throughbore and an annular groove formed circumferentially around the interior of the throughbore. A shaft having a splined free end is slidably received in the throughbore so that the splines intermesh with each other and so that the end of the shaft overlies said groove. The shaft and the annulus are then fixedly secured to each other by deforming the end of the shaft radially outwardly so that a portion of the deformed shaft end enters and at least partially fills the groove.
Description
SPLI NED MACH I NE PART
____ _ Back~round of the Xnvention I. Field of the Invention ~ The present invention relates generally to machine 5 a parts and, more particularly, to a spline connection between an annulus and a shaft.
II. Description of the Prior Art Machine parts consisting of an annulus and a shaft ~ extending outwardly from the annulus are commonly used in ~ Industry. Many such machine parts, for example, are used in ~ the automotive transmission for motor vehicles.
w ~ In many cases, the machine part is formed by z casting the annulus and the shaft as a one piece component ~ and thereafter machining the component as required. While 3 this previously known method for constructing the machine part is effective and produces a machine part having Z adequate strength, the manufacturing process is very N
expensive and time consuming.
z A still further method for constructing machine ~ parts has been to construct the annulus and the shaft separately and then secure the shaft and annulus together.
A number of means, such as welding, screws, dimpling, and ~ the like have been used to secure the shaft and the annulus w together but all of these previously known methods suffer ~ from a number of disadvantages.
_ One disadvantage Oc these previously known methods for joining the shaft and the annulus together is that the O joining operation is both expensive and time consuming to l , perform. This is particularly true, for example, for a welding operation.
Still other methods, such as using threaded O fasteners to secure the annulus and the shaft together, have r been known to fail after extended use. Such failure is ~ particularly unacceptable in automatic transmissions for -vehicles since such a failure can result in destruction of the transmission.
In still other cases, the shaft is deformed with ~ respect to the annulus so that the deformation locks the Z~ annulus and the shaft together. These previously known 0 Q methods, however, have not provided adequate tensile ~ strength between the shaft and the annulus so that the ,i 0 component was prone to fail in use.
,., z Summary of the Present Invention n The present invention provides a machine part which ~ overcomes all of the above mentioned disadvantages of the ~ previously known devices.
O In brief, the machine part of the present invention comprises an annulus, such as a gear, having a throughbore.
~. A plurality of axially extending splines are formed along ~ the interior of the throughbore. Additionally, an annular groove is formed circumferentially around the interior of w the throughbore. Preferably, the annulus is constructed from powdered metal.
w A shaft has a free cnd with a plurality of axially ~c extending splines ormed along the end o the shaft. The ~, splines do not have to be manufactured with a hish degree of precision and thus can be inexpensively manufactured by o rollinc. The end of the shaft is s`idably received within I r the throughbore so that the annulus splin-s and shaft splines intermesh with each other. The shaft is positioned so that an end of the shaft overlies the circumferentially r extending groove in the annulus. Additionally, the shaft ID
~ includes an axial opening at its free end so that the ~ splined end of the shaft is tubular.
In order ~o join the shaft and annulus together, the shaft end is positioned within the annulus throughbore in the above described fashion until the end of the shaft ~ overlies the circumferential groove in the annulus. A
m conically shaped ram is then forced under pressure into the open end of the shaft thus flaring the open end of the shaft radially outwardly. In doing so, a portion of the deformad w z shaft enters into and at least partially fills the ~ circumferentially extending groove in the annulus.
3 Consequently, the spline connection between the ~ annulus and the shaft locks the annulus and the shaft Z together against relative rotation. Similarly, the deformed portion of the shaft which enters into the groove in the z annulus rigidly and fixedly locks the shaft and annulus ~ together against axial displacement. Furthermore, the 6 annulus and shaft re~ain axially locked together even when ~w extremely high tensile forces are applied between the annulus and the shaft.
wBrief Description of the Drawings 25 rA better understanding of the present invention will be had upon referencc to the following detailed description when read in conjunction with the accompanying LO drawing, wherein likc reference charactcrs refer to like ~ r parts throughout the several views, and in which:
FIG. 1 is an 2xploded longitudinal sectional view illustrating a preferred embodiment of the present ~ invention;
ID
~ FIG. 2 is a longitudinal sectional view O illustrating the preferred embodiment of the invention; and ~ FIG. 3 is a crossectional view taken along lines i ~ 3-3 in FIG. 2.
I Detailed Description of a Preferred Z Embodiment of the Presen~ Invention ~ ~ith reference first to FIG. 1, a preferred embodiment of the present invention is thereshown and ~ comprises an annulus 10, such as a gear, having a central 1~
Z and axially extending throughbore 12. A plurality of a circumferentially spaced and axially extending splines 14 I5 3 (FIG. 3) are formed along the interior of the throughbore 12.
O Preferably, the annulus 10 is constructed from .: N
powdered metal, such as powdered steel. Other materials, z however/ may alternatively be used.
~ With reference still to FIG. 1, at least one circumferentially extending groove 16 is formed around the interior of the annulus throughbore 12. The purpose of this annular grc,ove will be subsequently described and, ~ optionally, a plurality of grooves are provided.
Z With reference now to FIGS. 1 and 2, an elongated a~
- shaft 18 having a free end 20 is also provided. A plurality of longitudinally extending exterior splines 22 are provided n along the outer periphery of the shaft 18 adjacent its end ~ . 20.- Additionally, as best shown in FIG. 2, the shaft 20 includes an axial opening 24 at its end 20 so tha~ the splined end of the shaft 18 is substantially tubular.
A~ best shown in FIGS. 2 and 3, the shaft 18 and ID
~ annulus throughbore 12 are dimensioncd so that the shaft end -20 is axially slidably received in the throughbore 12 and, ~ in doing so, the shaft splines 22 intermesh with the - throughbore splines 14 and lock the shaft 18 and annulus 10 ~ together against relative rotation. Furthermore, the shaft Z~ end 20 is positioned so that the shaft end 20 overlies the 10 m annular groove 16 (~IG. 2). Preferably, the annulur groove 16 -registers with the portion of the shaft 18 immediately adjacent its free end 20.
Iî~
z Referring now to FIG. 2, with ~he shaft 18 ~ positioned within the throughbore 12 as described above, a -15 ~ conically shaped ram or wedge 26 i5 driven into the shaft ~ opening 24 under pressure so that the shaft end 20 is Z deformed and flared radially outwardly. In doing so, a portion 28 of the shaft 18 enters and at least partially z fills the annular groove 16 on the annulus 12. This ~ deformed portion 28 thus locks the shaft 18 and annulus 10 against relative axial movement even when the shaft 18 and annulus 10 are subjected to high tensile forces.
Alternatively, a groove is formed at the end of the w shaft 18. In this embodiment, the ram 26 deforms the shaft - 18 and annulus throughbore 12 so that a portion of the annulus 10 enters and partially fills the groove.
From the foregoing, it can be seen that the present @
invention provides a sim~le, inexpensive and yet tc~ally l ~ effective means for constructing a machine part having an annulus and an outwardly extending 3haft. Furthermore, in the present invention, the shaft and annulus are rigidly locked together against both rotational and axial forces.
ID
~ Having described my invention, however, many modifications thereto will become apparent to those skilled in the art to which it pertains without deviation from the spirit of the invention as defined by the scope of the ~ appended claims.
Z~ I claim:
u b o s z 2- c b~
n s
____ _ Back~round of the Xnvention I. Field of the Invention ~ The present invention relates generally to machine 5 a parts and, more particularly, to a spline connection between an annulus and a shaft.
II. Description of the Prior Art Machine parts consisting of an annulus and a shaft ~ extending outwardly from the annulus are commonly used in ~ Industry. Many such machine parts, for example, are used in ~ the automotive transmission for motor vehicles.
w ~ In many cases, the machine part is formed by z casting the annulus and the shaft as a one piece component ~ and thereafter machining the component as required. While 3 this previously known method for constructing the machine part is effective and produces a machine part having Z adequate strength, the manufacturing process is very N
expensive and time consuming.
z A still further method for constructing machine ~ parts has been to construct the annulus and the shaft separately and then secure the shaft and annulus together.
A number of means, such as welding, screws, dimpling, and ~ the like have been used to secure the shaft and the annulus w together but all of these previously known methods suffer ~ from a number of disadvantages.
_ One disadvantage Oc these previously known methods for joining the shaft and the annulus together is that the O joining operation is both expensive and time consuming to l , perform. This is particularly true, for example, for a welding operation.
Still other methods, such as using threaded O fasteners to secure the annulus and the shaft together, have r been known to fail after extended use. Such failure is ~ particularly unacceptable in automatic transmissions for -vehicles since such a failure can result in destruction of the transmission.
In still other cases, the shaft is deformed with ~ respect to the annulus so that the deformation locks the Z~ annulus and the shaft together. These previously known 0 Q methods, however, have not provided adequate tensile ~ strength between the shaft and the annulus so that the ,i 0 component was prone to fail in use.
,., z Summary of the Present Invention n The present invention provides a machine part which ~ overcomes all of the above mentioned disadvantages of the ~ previously known devices.
O In brief, the machine part of the present invention comprises an annulus, such as a gear, having a throughbore.
~. A plurality of axially extending splines are formed along ~ the interior of the throughbore. Additionally, an annular groove is formed circumferentially around the interior of w the throughbore. Preferably, the annulus is constructed from powdered metal.
w A shaft has a free cnd with a plurality of axially ~c extending splines ormed along the end o the shaft. The ~, splines do not have to be manufactured with a hish degree of precision and thus can be inexpensively manufactured by o rollinc. The end of the shaft is s`idably received within I r the throughbore so that the annulus splin-s and shaft splines intermesh with each other. The shaft is positioned so that an end of the shaft overlies the circumferentially r extending groove in the annulus. Additionally, the shaft ID
~ includes an axial opening at its free end so that the ~ splined end of the shaft is tubular.
In order ~o join the shaft and annulus together, the shaft end is positioned within the annulus throughbore in the above described fashion until the end of the shaft ~ overlies the circumferential groove in the annulus. A
m conically shaped ram is then forced under pressure into the open end of the shaft thus flaring the open end of the shaft radially outwardly. In doing so, a portion of the deformad w z shaft enters into and at least partially fills the ~ circumferentially extending groove in the annulus.
3 Consequently, the spline connection between the ~ annulus and the shaft locks the annulus and the shaft Z together against relative rotation. Similarly, the deformed portion of the shaft which enters into the groove in the z annulus rigidly and fixedly locks the shaft and annulus ~ together against axial displacement. Furthermore, the 6 annulus and shaft re~ain axially locked together even when ~w extremely high tensile forces are applied between the annulus and the shaft.
wBrief Description of the Drawings 25 rA better understanding of the present invention will be had upon referencc to the following detailed description when read in conjunction with the accompanying LO drawing, wherein likc reference charactcrs refer to like ~ r parts throughout the several views, and in which:
FIG. 1 is an 2xploded longitudinal sectional view illustrating a preferred embodiment of the present ~ invention;
ID
~ FIG. 2 is a longitudinal sectional view O illustrating the preferred embodiment of the invention; and ~ FIG. 3 is a crossectional view taken along lines i ~ 3-3 in FIG. 2.
I Detailed Description of a Preferred Z Embodiment of the Presen~ Invention ~ ~ith reference first to FIG. 1, a preferred embodiment of the present invention is thereshown and ~ comprises an annulus 10, such as a gear, having a central 1~
Z and axially extending throughbore 12. A plurality of a circumferentially spaced and axially extending splines 14 I5 3 (FIG. 3) are formed along the interior of the throughbore 12.
O Preferably, the annulus 10 is constructed from .: N
powdered metal, such as powdered steel. Other materials, z however/ may alternatively be used.
~ With reference still to FIG. 1, at least one circumferentially extending groove 16 is formed around the interior of the annulus throughbore 12. The purpose of this annular grc,ove will be subsequently described and, ~ optionally, a plurality of grooves are provided.
Z With reference now to FIGS. 1 and 2, an elongated a~
- shaft 18 having a free end 20 is also provided. A plurality of longitudinally extending exterior splines 22 are provided n along the outer periphery of the shaft 18 adjacent its end ~ . 20.- Additionally, as best shown in FIG. 2, the shaft 20 includes an axial opening 24 at its end 20 so tha~ the splined end of the shaft 18 is substantially tubular.
A~ best shown in FIGS. 2 and 3, the shaft 18 and ID
~ annulus throughbore 12 are dimensioncd so that the shaft end -20 is axially slidably received in the throughbore 12 and, ~ in doing so, the shaft splines 22 intermesh with the - throughbore splines 14 and lock the shaft 18 and annulus 10 ~ together against relative rotation. Furthermore, the shaft Z~ end 20 is positioned so that the shaft end 20 overlies the 10 m annular groove 16 (~IG. 2). Preferably, the annulur groove 16 -registers with the portion of the shaft 18 immediately adjacent its free end 20.
Iî~
z Referring now to FIG. 2, with ~he shaft 18 ~ positioned within the throughbore 12 as described above, a -15 ~ conically shaped ram or wedge 26 i5 driven into the shaft ~ opening 24 under pressure so that the shaft end 20 is Z deformed and flared radially outwardly. In doing so, a portion 28 of the shaft 18 enters and at least partially z fills the annular groove 16 on the annulus 12. This ~ deformed portion 28 thus locks the shaft 18 and annulus 10 against relative axial movement even when the shaft 18 and annulus 10 are subjected to high tensile forces.
Alternatively, a groove is formed at the end of the w shaft 18. In this embodiment, the ram 26 deforms the shaft - 18 and annulus throughbore 12 so that a portion of the annulus 10 enters and partially fills the groove.
From the foregoing, it can be seen that the present @
invention provides a sim~le, inexpensive and yet tc~ally l ~ effective means for constructing a machine part having an annulus and an outwardly extending 3haft. Furthermore, in the present invention, the shaft and annulus are rigidly locked together against both rotational and axial forces.
ID
~ Having described my invention, however, many modifications thereto will become apparent to those skilled in the art to which it pertains without deviation from the spirit of the invention as defined by the scope of the ~ appended claims.
Z~ I claim:
u b o s z 2- c b~
n s
Claims (13)
1. A machine part assembly comprising:
an annulus having a throughbore with a plurality of axially extending splines and an annular groove formed circumferentially around the interior of said throughbore, a shaft having a free end with a plurality of axially extending splines formed thereon, said end of said shaft being slidably received in said throughbore so that said annulus splines and said shaft splined intermesh with each other and so that the end of said shaft overlies said groove, said shaft and said annulus being fixedly secured to each other by deforming said end of said shaft radially outwardly so that a portion of the deformed shaft end enters and at least partially fills said groove.
an annulus having a throughbore with a plurality of axially extending splines and an annular groove formed circumferentially around the interior of said throughbore, a shaft having a free end with a plurality of axially extending splines formed thereon, said end of said shaft being slidably received in said throughbore so that said annulus splines and said shaft splined intermesh with each other and so that the end of said shaft overlies said groove, said shaft and said annulus being fixedly secured to each other by deforming said end of said shaft radially outwardly so that a portion of the deformed shaft end enters and at least partially fills said groove.
2. The invention as defined in claim 1 wherein said annulus is constructed from powdered metal.
3. The invention as defined in claim 1 wherein said shaft overlies said groove immediately adjacent the free end of said shaft.
4. The invention as defined in claim 1 wherein said shaft end is radially outwardly deformed by a ram forced into an interior opening on said shaft end.
5. The invention as defined in claim 1 and comprising a plurality of annular grooves formed circumferentially around the interior of said throughbore.
6. A method for fixedly attaching an annulus to one end of a shaft, said annular having a throughbore with a plurality of axially extending splines and an annular groove formed circumferentially around the interior of said throughbore, said shaft having a free end with a plurality of axially extending splines formed thereon, said method comprising the steps of:
axially slidably positioning said end of said shaft in said throughbore so that said annulus splines and said shaft splines intermesh with each other and so that the end of said shaft overlies said groove, deforming said end of said shaft radially outwardly so that a portion of the deformed shaft end enters and at least partially fills said groove.
axially slidably positioning said end of said shaft in said throughbore so that said annulus splines and said shaft splines intermesh with each other and so that the end of said shaft overlies said groove, deforming said end of said shaft radially outwardly so that a portion of the deformed shaft end enters and at least partially fills said groove.
7. The invention as defined in claim 6 wherein said deforming step comprises the step of forcing a wedge into an opening at said end of said shaft.
8. The invention as defined in claim 6 wherein said annulus is constructed from powdered metal.
9. The invention as defined in claim 9 wherein said positioning step comprises the step of positioning said shaft so that the groove registers with said shaft immediately adjacent its free end.
10. A machine part assembly comprising:
an annulus having a throughbore with a plurality of axially extending splines, a shaft having a free end with a plurality of axially extending splines formed thereon and an annular groove formed circumferentially around an outer periphery of said shaft, said end of said shaft being slidably received in said throughbore so that said annulus splines and said shaft splines intermesh with each other and so that the annulus throughbore overlies said groove, said shaft and said annulus being fixedly secured to each other by deforming said end of said shaft radially outwardly so that a portion of the annulus end enters and at least partially f ills said groove.
an annulus having a throughbore with a plurality of axially extending splines, a shaft having a free end with a plurality of axially extending splines formed thereon and an annular groove formed circumferentially around an outer periphery of said shaft, said end of said shaft being slidably received in said throughbore so that said annulus splines and said shaft splines intermesh with each other and so that the annulus throughbore overlies said groove, said shaft and said annulus being fixedly secured to each other by deforming said end of said shaft radially outwardly so that a portion of the annulus end enters and at least partially f ills said groove.
11. The invention as defined in claim 10 wherein said annulus is constructed from powdered metal.
12. The invention as defined in claim 10 wherein said groove is formed immediately adjacent the free end of said shaft.
13. The invention as defined in claim 10 wherein said shaft end is radially outwardly deformed by a ram forced into an interior opening on said shaft end.
DWS/tlk
DWS/tlk
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US75575391A | 1991-09-06 | 1991-09-06 | |
| US07/755,753 | 1991-09-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2077703A1 true CA2077703A1 (en) | 1993-03-07 |
Family
ID=25040513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2077703 Abandoned CA2077703A1 (en) | 1991-09-06 | 1992-09-08 | Splined machine part |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2077703A1 (en) |
-
1992
- 1992-09-08 CA CA 2077703 patent/CA2077703A1/en not_active Abandoned
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |