US20040035000A1 - Inner spline member and manufacturing method thereof - Google Patents
Inner spline member and manufacturing method thereof Download PDFInfo
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- US20040035000A1 US20040035000A1 US10/461,918 US46191803A US2004035000A1 US 20040035000 A1 US20040035000 A1 US 20040035000A1 US 46191803 A US46191803 A US 46191803A US 2004035000 A1 US2004035000 A1 US 2004035000A1
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- interior
- splined
- punch
- spline
- cylindrical member
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- 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
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
- F16D1/101—Quick-acting couplings in which the parts are connected by simply bringing them together axially without axial retaining means rotating with the coupling
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- 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
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
- F16D2001/103—Quick-acting couplings in which the parts are connected by simply bringing them together axially the torque is transmitted via splined connections
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49481—Wheel making
- Y10T29/49492—Land wheel
Definitions
- the present invention relates to spline structure on an inner surface of a cylindrical element, and a manufacturing method thereof.
- Cylindrical elements having a splined inner surface are widely used in, for example, automotive parts and the like.
- the splined inner surface of a cylindrical element is usually formed by broaching, which is a type of cutting, the interior surface of the cylindrical element.
- broaching forms grooves by moving a tool in one axial direction and, therefore, burrs can be created on the edges of the grooves when the tool is removed. In such cases, a deburring process is necessary, further increasing the cost of the process.
- the splines may also be formed by a cold forging process.
- burrs are created on edges thereof. Therefore, in this case as well, a deburring process becomes necessary, increasing the cost of the process.
- the cutting is interrupted as the cutting tip alternately passes through the crests and through open areas of the splined surface and, therefore, the life of the cutting tip is extremely shortened.
- a cylindrical member having a cylindrical interior surface defining a through hole has its interior surface splined with alternating ribs (spline teeth) and troughs (grooves disposed between the ribs) extending axially over a major portion of the axial length of the cylindrical interior surface, from one end face at one end of the cylindrical member to a point on the cylindrical surface, with a minor portion (“ring-shaped portion”) of the interior surface, extending axially from that point to a second end face of the cylindrical member, opposite the one face, unsplined.
- the ring-shaped minor portion of the cylindrical surface is substantially circular with a diameter that is equal to or smaller than that of a circle defined by distal ends (tips) of the ribs.
- the troughs extend axially between ends, which are open at one end face of the cylindrical member, and opposite ends closed by the ring-shaped (“residual thickness”) portion.
- cylindrical member is intended to include elements which are cylindrical overall, as well as elements having a cylindrical portion.
- the interior splined member according to the present invention has a cylindrical interior surface including a splined portion and the ring-shaped residual portion. Further, the troughs of the splined portion are closed at one end by the ring-shaped residual (unsplined) portion. Thus, the troughs of the splined portion are closed at one end, instead of opening at both end faces of the cylindrical member (or “cylindrical portion”).
- a method for manufacturing an interior splined member includes the steps of:
- the splined portion is formed by cold forging. More specifically, the cold forging process is performed such that the troughs are closed on the one end side by the ring-shaped residual portion, instead of the troughs of the splined surface penetrating both end faces of the cylindrical member.
- the interior splined member according to the first aspect of the present invention preferably has the end face surfaces of the cylindrical member finished by cutting.
- the edge surface of the ring-shaped residual portion is finished by cutting and, therefore, a ring shape without unevenness or a gear shape is obtained.
- a ring shape without unevenness or a gear shape is obtained.
- the method for manufacturing an interior splined member according to the second aspect of the present invention further includes finishing surfaces of the splines by cutting.
- smooth processing can be performed, and an interior splined member can be obtained with a greatly improved function.
- the cold forging preferably includes using an outer peripheral punch (“ring”) supporting a cylindrical member around its outer peripheral surface, an end portion punch supporting one end portion of the cylindrical member, and a spline punch having a spline-forming portion, with a shape corresponding to that of the splined portion, and a column-forming portion with an outer diameter corresponding to the inner diameter of the ring-shaped residual portion.
- the ring-shaped residual portion is formed by supporting the cylindrical member with the outer peripheral punch and the end portion punch.
- the spline punch is inserted into the through-hole of the cylindrical member and moved along its interior surface to cut the splines.
- the spline punch is stopped at a position within the cylindrical member by abutment of the column-forming portion of the spline punch.
- the cylindrical member By performing cold forging utilizing at least the outer peripheral punch, the end portion punch, and the spline punch, the cylindrical member can be easily splined.
- Provision of a brim-shaped flange portion on an end of the cylindrical member allows it to be utilized as a carrier cover, which is a part of the planetary gear set of an automatic transmission, and as elements for various other applications.
- FIG. 1 is a partial cutout cross-sectional view of an interior splined member according to a first embodiment of the invention
- FIG. 2 is an explanatory drawing showing a blank cylindrical member set between an end punch and a ring member (“outer peripheral punch”) for executing a cold forging splining process according to the invention
- FIG. 3 is an explanatory drawing showing a state immediately after cold forging of the splines with the spline punch advanced within the cylindrical member according to the first embodiment
- FIG. 4 is an explanatory drawing showing a state in which an interior splined member is knocked out after completion of the cold forging process according to the first embodiment
- FIG. 5 is an explanatory drawing showing the shape of a cross-section of the interior splined member after completion of the cold forging process according to the first embodiment
- FIG. 6 is an explanatory drawing showing the shape of a cross-section of the interior splined member after cutting according to the first embodiment.
- FIG. 7 is a diagram showing the interior splined member as incorporated into a planetary gear set.
- FIGS. 1 to 6 A preferred embodiment of the present invention will now be described with reference to FIGS. 1 to 6 .
- an interior splined member 1 of the present embodiment includes a cylindrical portion 2 providing a through hole 29 , and a splined portion 20 providing alternating ribs 21 and troughs 22 disposed between the ribs (crests) 21 which extend axially along the inner surface of the cylindrical portion 2 .
- a ring-shaped residual thickness portion 23 has an inner peripheral surface that is substantially circular with a diameter identical to that of a circle defined by the distal tips (“crests”) of ribs 21 .
- the troughs 22 are open at one end 202 and closed by the ring portion 23 at their other end 201 .
- the interior splined member is a carrier cover for a planetary gear unit of an automatic transmission, including the cylindrical portion 2 and a brim-shaped flange portion 19 provided around the one end 201 of the cylindrical portion 2 .
- This interior splined member 1 is formed from a starting piece (blank) 100 of a material such as steel (SAPH440) that includes the cylindrical portion 2 , which provides the through hole 29 and which includes the flange portion 19 .
- blade a material such as steel
- the splines 20 are formed, with ring-shaped portion 23 left at the one end 201 of the cylindrical portion 2 .
- the splined surface 20 is formed by use of an outer ring (“outer peripheral punch”) 51 supporting the cylindrical portion 2 in cooperation with an end portion punch 52 and a spline punch 53 .
- the spline punch 53 includes a spline-forming portion 531 having a shape that corresponds to that of the splined surface 20 and a column-forming portion 532 with an outer diameter corresponding to that of the inner diameter of the ring portion 23 .
- the cylindrical portion 2 is supported by holding the starting piece 100 between the ring 51 and the end portion punch 52 .
- the spline punch 53 is advanced relative to the inner surface of the cylindrical portion 2 .
- a shoulder on the column-forming portion 532 of the spline punch 53 stops advance of the spline punch 53 at a position within the cylindrical portion predetermined to leave ring portion 23 without the cold-forged splines.
- the starting piece 100 is formed into the interior splined member 1 having a splined surface portion 20 within the cylindrical portion 2 and a ring-shaped residual thickness portion 23 .
- the interior splined member 1 is removed by retracting the end portion punch 52 , and advancing a knock-out member 54 disposed between the ring 51 and the spline punch 53 .
- the resultant cold-forged product is interior splined member 1 having excess material portions 251 and 252 respectively protruding axially from the one end portion 201 and the other end portion 202 of the cylindrical portion 2 .
- these excess material portions 251 and 252 are respectively removed by cutting.
- an edge surface 261 is cut on an axial end of the ring-shaped residual portion, i.e., at the end 201 of the cylindrical portion 2 .
- an edge surface 262 is cut on the opposite axial end 202 of the cylindrical portion 2 as well. Both of edge surfaces 261 and 262 are flat surfaces perpendicular to the axis of the cylindrical portion 2 .
- a cold forging process which forms the splines by the relative movement of the spline punch 53 , does not form burrs on the end portion 202 of the cylinder 2 because the spline punch 53 is advanced from that end.
- the column-forming portion 532 of the spline punch 53 stops the relative forward advancement of the spline punch 53 at a position within the cylindrical portion 2 , leaving the ring-shaped residual portion 23 unsplined, and formation of burrs is also avoided at the end 201 side. Accordingly, in the present embodiment, a deburring process is not necessary after forming the splines by cold forging, which reduces processing costs.
- the interior splined member 1 of the present embodiment is a carrier cover for a planetary gear set and, therefore, it is necessary to provide highly accurate cut edge surfaces 261 and 262 on both end faces of the cylindrical portion 2 as described above.
- the ring-shaped residual portion 23 is provided at the one end 201 of the cylindrical portion 2 and, therefore, the cutting of the edge surface 261 can be smoothly and continuously performed without intermittent cutting. Thus, it is also possible to avoid shortening of the life of the cutting tip used for this cutting. In addition, as described later, when using the cut edge surface 261 as a datum plane for a bearing, better stabilization of the contact with the bearing is achieved.
- FIG. 7 illustrates the interior splined member 1 of the above-described preferred embodiment incorporated into a planetary gear unit 8 .
- the interior splined member 1 is a carrier cover provided within the open end of a flange 84 of a hollow shaft 8 via an input sleeve 85 .
- the cut edge surface 261 at the one end 201 of the cylindrical portion 2 of the interior splined member 1 functions as a datum plane on which a bearing 82 is disposed.
- a splined portion 850 is formed on an outer peripheral surface of the input sleeve 85 , and this is engaged with the splined portion 20 on the interior surface of the cylindrical portion 2 of the interior splined member 1 .
- the ring-shaped residual portion (original thickness portion) 23 described above closes the troughs 22 at the end 201 side of the cylindrical portion 2 of the splined member 1 ; however, the troughs 22 are open at the other end 202 . Further, a sufficient length is secured for the splined portion 20 .
- the engagement of the splined portion 850 of the input sleeve 85 with the splined portion 20 of the interior splined member 1 can be realized without any problems.
Abstract
An interior splined member is a hollow cylinder with an interior cylindrical surface defining a through hole. A major portion of the axial length of the interior cylindrical surface is splined to provide alternating axially extending ribs and troughs disposed between the ribs. A ring-shaped residual portion is an unsplined portion, i.e., a minor portion of the axial length of the interior cylindrical surface and is substantially circular with a diameter that is equal to or smaller than that of a circle on which the distal ends (tips) of the ribs lie. The trough portions are open at one end of the cylindrical member, while closed by the ring-shaped residual portion at the other end of the cylindrical member.
Description
- This application claims, under 35 USC 119, priority of Japanese Application No. 2002-190385 filed on Jun. 28, 2002.
- The disclosure of Japanese Patent Application No. 2002-190385 filed on Jun. 28, 2002 including the specification, drawings and abstract is incorporated herein by reference in its entirety.
- 1. Field of the Invention
- The present invention relates to spline structure on an inner surface of a cylindrical element, and a manufacturing method thereof.
- 2. Related Art
- Cylindrical elements having a splined inner surface are widely used in, for example, automotive parts and the like. The splined inner surface of a cylindrical element is usually formed by broaching, which is a type of cutting, the interior surface of the cylindrical element.
- However, manufacturing cylindrical elements with interior splines by conventional broaching encounters a number of problems. The tools for broaching are extremely costly and the process is very time consuming. Therefore, reducing the cost of forming the splines is difficult. In addition, broaching forms grooves by moving a tool in one axial direction and, therefore, burrs can be created on the edges of the grooves when the tool is removed. In such cases, a deburring process is necessary, further increasing the cost of the process.
- The splines may also be formed by a cold forging process. However, by forming a splined portion through cold forging, burrs are created on edges thereof. Therefore, in this case as well, a deburring process becomes necessary, increasing the cost of the process.
- Furthermore, when the deburring process is performed by cutting, the cutting is interrupted as the cutting tip alternately passes through the crests and through open areas of the splined surface and, therefore, the life of the cutting tip is extremely shortened.
- In view of the foregoing problems, it is an object of the present invention to provide a cylindrical element with an interior splined surface and a method for manufacturing same which does not necessitate deburring and therefore is capable of reducing processing costs.
- According to a first aspect of the present invention, a cylindrical member having a cylindrical interior surface defining a through hole, has its interior surface splined with alternating ribs (spline teeth) and troughs (grooves disposed between the ribs) extending axially over a major portion of the axial length of the cylindrical interior surface, from one end face at one end of the cylindrical member to a point on the cylindrical surface, with a minor portion (“ring-shaped portion”) of the interior surface, extending axially from that point to a second end face of the cylindrical member, opposite the one face, unsplined. The ring-shaped minor portion of the cylindrical surface is substantially circular with a diameter that is equal to or smaller than that of a circle defined by distal ends (tips) of the ribs. Thus, the troughs extend axially between ends, which are open at one end face of the cylindrical member, and opposite ends closed by the ring-shaped (“residual thickness”) portion.
- As used herein “cylindrical member” is intended to include elements which are cylindrical overall, as well as elements having a cylindrical portion.
- As described above, the interior splined member according to the present invention has a cylindrical interior surface including a splined portion and the ring-shaped residual portion. Further, the troughs of the splined portion are closed at one end by the ring-shaped residual (unsplined) portion. Thus, the troughs of the splined portion are closed at one end, instead of opening at both end faces of the cylindrical member (or “cylindrical portion”).
- In manufacturing such a splined structure, a process for opening the trough portions at the closed end is not necessary and, therefore, the occurrence of burrs there is avoided, deburring is unnecessary and manufacturing costs can be reduced.
- According to a second aspect of the present invention, a method for manufacturing an interior splined member includes the steps of:
- providing a cylindrical member having a cylindrical interior surface defining a through hole,
- forming splines on a portion of the cylindrical interior surface, the spined interior surface portion having alternating ribs (spline teeth) and troughs, disposed between the ribs, extending axially along the cylindrical interior surface, by cold forging of the cylindrical member, and
- leaving unsplined a ring-shaped residual (minor axial length) portion having an inner surface that is substantially circular with a diameter that is equal to or smaller than a circle defined by distal ends (tips) of the ribs.
- In the manufacturing method according to the present invention, the splined portion is formed by cold forging. More specifically, the cold forging process is performed such that the troughs are closed on the one end side by the ring-shaped residual portion, instead of the troughs of the splined surface penetrating both end faces of the cylindrical member.
- Thus, when forming the splined portion by cold forging, the occurrence of burrs at end portions is reliably prevented. Therefore, processing costs can be reduced because a deburring process is not necessary.
- The interior splined member according to the first aspect of the present invention preferably has the end face surfaces of the cylindrical member finished by cutting.
- As described above, in the present invention, because a ring-shaped residual portion is left unsplined, when cutting the axial end face of the cylindrical member, at the side of the ring-shaped residual portion, continuous and smooth cutting can be performed, as contrasted with intermittent cutting. Further, the useful life of the cutting tip is thereby prolonged. Thus, the presence of the ring-shaped residual portion is particularly effective when cutting edge surfaces.
- In addition, the edge surface of the ring-shaped residual portion is finished by cutting and, therefore, a ring shape without unevenness or a gear shape is obtained. Thus, for example, when used as a datum plane for a bearing, better stabilization of the state of contact with the bearing is realized, and the function of the interior splined member is improved.
- Preferably, the method for manufacturing an interior splined member according to the second aspect of the present invention further includes finishing surfaces of the splines by cutting. In this case as well, smooth processing can be performed, and an interior splined member can be obtained with a greatly improved function.
- In the method for manufacturing an interior splined member according to the second aspect of the present invention, the cold forging preferably includes using an outer peripheral punch (“ring”) supporting a cylindrical member around its outer peripheral surface, an end portion punch supporting one end portion of the cylindrical member, and a spline punch having a spline-forming portion, with a shape corresponding to that of the splined portion, and a column-forming portion with an outer diameter corresponding to the inner diameter of the ring-shaped residual portion. The ring-shaped residual portion is formed by supporting the cylindrical member with the outer peripheral punch and the end portion punch. The spline punch is inserted into the through-hole of the cylindrical member and moved along its interior surface to cut the splines. The spline punch is stopped at a position within the cylindrical member by abutment of the column-forming portion of the spline punch.
- By performing cold forging utilizing at least the outer peripheral punch, the end portion punch, and the spline punch, the cylindrical member can be easily splined.
- Provision of a brim-shaped flange portion on an end of the cylindrical member allows it to be utilized as a carrier cover, which is a part of the planetary gear set of an automatic transmission, and as elements for various other applications.
- FIG. 1 is a partial cutout cross-sectional view of an interior splined member according to a first embodiment of the invention;
- FIG. 2 is an explanatory drawing showing a blank cylindrical member set between an end punch and a ring member (“outer peripheral punch”) for executing a cold forging splining process according to the invention;
- FIG. 3 is an explanatory drawing showing a state immediately after cold forging of the splines with the spline punch advanced within the cylindrical member according to the first embodiment;
- FIG. 4 is an explanatory drawing showing a state in which an interior splined member is knocked out after completion of the cold forging process according to the first embodiment;
- FIG. 5 is an explanatory drawing showing the shape of a cross-section of the interior splined member after completion of the cold forging process according to the first embodiment;
- FIG. 6 is an explanatory drawing showing the shape of a cross-section of the interior splined member after cutting according to the first embodiment; and
- FIG. 7 is a diagram showing the interior splined member as incorporated into a planetary gear set.
- A preferred embodiment of the present invention will now be described with reference to FIGS.1 to 6.
- As shown in FIG. 1, an interior splined
member 1 of the present embodiment includes acylindrical portion 2 providing a throughhole 29, and asplined portion 20 providingalternating ribs 21 andtroughs 22 disposed between the ribs (crests) 21 which extend axially along the inner surface of thecylindrical portion 2. - A ring-shaped
residual thickness portion 23 has an inner peripheral surface that is substantially circular with a diameter identical to that of a circle defined by the distal tips (“crests”) ofribs 21. Thetroughs 22 are open at oneend 202 and closed by thering portion 23 at theirother end 201. - As shown in FIG. 1, the interior splined member is a carrier cover for a planetary gear unit of an automatic transmission, including the
cylindrical portion 2 and a brim-shapedflange portion 19 provided around the one end 201 of thecylindrical portion 2. - This interior
splined member 1, as shown in FIG. 2, is formed from a starting piece (blank) 100 of a material such as steel (SAPH440) that includes thecylindrical portion 2, which provides the throughhole 29 and which includes theflange portion 19. - Further, by cold forging of the interior surface of the
cylindrical portion 2 of startingpiece 100, thesplines 20 are formed, with ring-shapedportion 23 left at the oneend 201 of thecylindrical portion 2. - More specifically, as shown in FIGS.2 to 5, the
splined surface 20 is formed by use of an outer ring (“outer peripheral punch”) 51 supporting thecylindrical portion 2 in cooperation with anend portion punch 52 and aspline punch 53. Thespline punch 53 includes a spline-formingportion 531 having a shape that corresponds to that of thesplined surface 20 and a column-formingportion 532 with an outer diameter corresponding to that of the inner diameter of thering portion 23. As further shown in FIG. 2, thecylindrical portion 2 is supported by holding the startingpiece 100 between thering 51 and theend portion punch 52. - Next, as shown in FIG. 3, the
spline punch 53 is advanced relative to the inner surface of thecylindrical portion 2. A shoulder on the column-formingportion 532 of thespline punch 53 stops advance of thespline punch 53 at a position within the cylindrical portion predetermined to leavering portion 23 without the cold-forged splines. - Thus, the starting
piece 100 is formed into the interiorsplined member 1 having asplined surface portion 20 within thecylindrical portion 2 and a ring-shapedresidual thickness portion 23. - Thereafter, as shown in FIG. 4, the interior
splined member 1 is removed by retracting theend portion punch 52, and advancing a knock-out member 54 disposed between thering 51 and thespline punch 53. - As shown in FIG. 5, the resultant cold-forged product is interior
splined member 1 havingexcess material portions end portion 201 and theother end portion 202 of thecylindrical portion 2. Naturally, there are applications compatible with theseexcess material portions excess material portions edge surface 261 is cut on an axial end of the ring-shaped residual portion, i.e., at theend 201 of thecylindrical portion 2. Furthermore, anedge surface 262 is cut on the oppositeaxial end 202 of thecylindrical portion 2 as well. Both of edge surfaces 261 and 262 are flat surfaces perpendicular to the axis of thecylindrical portion 2. - In the present embodiment, a cold forging process which forms the splines by the relative movement of the
spline punch 53, does not form burrs on theend portion 202 of thecylinder 2 because thespline punch 53 is advanced from that end. In addition, on theend 201 side, the column-formingportion 532 of thespline punch 53 stops the relative forward advancement of thespline punch 53 at a position within thecylindrical portion 2, leaving the ring-shapedresidual portion 23 unsplined, and formation of burrs is also avoided at theend 201 side. Accordingly, in the present embodiment, a deburring process is not necessary after forming the splines by cold forging, which reduces processing costs. - As described above, the interior
splined member 1 of the present embodiment is a carrier cover for a planetary gear set and, therefore, it is necessary to provide highly accurate cut edge surfaces 261 and 262 on both end faces of thecylindrical portion 2 as described above. - In particular, the ring-shaped
residual portion 23 is provided at the oneend 201 of thecylindrical portion 2 and, therefore, the cutting of theedge surface 261 can be smoothly and continuously performed without intermittent cutting. Thus, it is also possible to avoid shortening of the life of the cutting tip used for this cutting. In addition, as described later, when using thecut edge surface 261 as a datum plane for a bearing, better stabilization of the contact with the bearing is achieved. - Thus, according to this preferred embodiment, it is possible to provide the interior
splined member 1 and a manufacturing method therefor which do not require deburring and which reduce processing costs. - FIG. 7 illustrates the interior
splined member 1 of the above-described preferred embodiment incorporated into aplanetary gear unit 8. - In the
planetary gear unit 8, as shown in FIG. 7, the interiorsplined member 1 is a carrier cover provided within the open end of aflange 84 of ahollow shaft 8 via aninput sleeve 85. Thecut edge surface 261 at the oneend 201 of thecylindrical portion 2 of the interiorsplined member 1 functions as a datum plane on which abearing 82 is disposed. - In addition, while other members such as a
pinion shaft 83 and acarrier 84 are engaged with the interiorsplined member 1, the interiorsplined member 1 is engaged with theinput sleeve 85 by splines. For this purpose, asplined portion 850 is formed on an outer peripheral surface of theinput sleeve 85, and this is engaged with thesplined portion 20 on the interior surface of thecylindrical portion 2 of the interiorsplined member 1. - As shown in FIG. 6 described earlier, the ring-shaped residual portion (original thickness portion)23 described above closes the
troughs 22 at theend 201 side of thecylindrical portion 2 of thesplined member 1; however, thetroughs 22 are open at theother end 202. Further, a sufficient length is secured for thesplined portion 20. Thus, the engagement of thesplined portion 850 of theinput sleeve 85 with thesplined portion 20 of the interiorsplined member 1 can be realized without any problems. - Further, as described above, in the
planetary gear unit 8, a deburring process is unnecessary because the ring-shapedresidual portion 23 is left unsplined and a reduction in the processing cost of the entire planetary gear unit is thereby achieved. In addition, since thecut edge surface 261 of the interiorsplined member 1 is formed as an edge surface of the ring-shapedresidual portion 23, a smooth ring shape or gear shape is obtained, and its precision as a datum plane for a bearing is increased. - The invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (7)
1. An interior splined member comprising a hollow cylindrical member having an interior cylindrical surface defining a through hole, said interior cylindrical surface including a splined portion providing alternating axially extending ribs and troughs and an unsplined ring-shaped residual portion that is substantially circular with a diameter equal to or smaller than the diameter of a circle defined by the distal ends of said ribs, said troughs opening at an end face at one axial end of said hollow cylindrical member and closed by said ring-shaped residual portion at a second axial end of said hollow cylindrical member.
2. The interior splined member according to claim 1 , wherein a cut edge surface is provided at the second axial end of the hollow cylindrical member.
3. The interior splined member according to claim 1 wherein said splined portion extends over a major portion of the axial length of said interior cylindrical surface and said unsplined portion extends over a minor portion of the axial length of said interior cylindrical surface.
4. A method for manufacturing an interior splined member comprising the steps of:
providing a cylindrical member having an interior cylindrical surface defining a through hole;
cold forming the interior cylindrical surface to form a splined portion on said interior cylindrical surface, said splined portion providing alternating, axially extending ribs and troughs; and
leaving unsplined a ring-shaped residual portion of said interior cylindrical surface which is substantially circular with a diameter equal to or smaller than the diameter of a circle defined by distal ends of the ribs.
5. The method for manufacturing an interior splined member according to claim 4 , further comprising the step of:
cutting an end face of the cylindrical member.
6. The method for manufacturing an interior splined member according to claim 4 , wherein the cold forging includes:
supporting the cylindrical member around an outer peripheral surface using an outer peripheral punch;
inserting an end portion punch into one end of the cylindrical member;
inserting a spline punch into an end of the cylindrical member opposite the one end, the spline punch having a spline-forming portion with a shape corresponding to the spline portion and a column-forming portion with an outer diameter corresponding to an inner diameter of the ring-shaped residual portion;
moving the spline punch relative to the interior cylindrical surface to form the splined portion; and
stopping said moving of the spline punch at a position within the cylindrical member by abutment of at least one portion of the column-forming portion of the spline punch.
7. The method for manufacturing an interior splined member according to claim 5 , wherein the cold forging includes:
supporting the cylindrical member around an outer peripheral surface using an outer peripheral punch;
inserting an end portion punch into one end of the cylindrical member;
inserting a spline punch into an end of the cylindrical member opposite the one end, the spline punch having a spline-forming portion with a shape corresponding to the spline portion and a column-forming portion with an outer diameter corresponding to an inner diameter of the ring-shaped residual portion;
moving the spline punch relative to the interior cylindrical surface to form the splined portion; and
stopping said moving of the spline punch at a position within the cylindrical member by abutment of at least one portion of the column-forming portion of the spline punch.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2002190385A JP2004034037A (en) | 2002-06-28 | 2002-06-28 | Inner spline member and its producing method |
JP2002-190385 | 2002-06-28 |
Publications (1)
Publication Number | Publication Date |
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US20040035000A1 true US20040035000A1 (en) | 2004-02-26 |
Family
ID=29774322
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US10/461,918 Abandoned US20040035000A1 (en) | 2002-06-28 | 2003-06-16 | Inner spline member and manufacturing method thereof |
Country Status (4)
Country | Link |
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US (1) | US20040035000A1 (en) |
JP (1) | JP2004034037A (en) |
CN (1) | CN1468681A (en) |
DE (1) | DE10328368A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8136380B2 (en) | 2007-09-26 | 2012-03-20 | Aisin Aw Co., Ltd. | Spline member manufacturing apparatus and manufacturing method |
US20140270921A1 (en) * | 2013-03-12 | 2014-09-18 | Johnson Electric S.A. | Hybrid torque transmission mechanism |
CN105108456A (en) * | 2015-08-31 | 2015-12-02 | 重庆创精温锻成型有限公司 | Manufacturing method of new-energy automobile drive motor shaft |
US10989294B2 (en) * | 2019-01-14 | 2021-04-27 | Schaeffler Technologies AG & Co. KG | Planetary drive assembly and method of connecting a planet carrier to a splined part |
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JP4862794B2 (en) * | 2007-09-26 | 2012-01-25 | アイシン・エィ・ダブリュ株式会社 | Spline member manufacturing method |
JP2009172663A (en) * | 2008-01-28 | 2009-08-06 | Shoda Seisakusho:Kk | Forming method and forming apparatus for inner diameter spline of hollow shaft |
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CN102489976A (en) * | 2011-11-29 | 2012-06-13 | 山东日新复合材料有限公司 | Processing technology of conveying chain gear shaft and improved manufacturing process of duplex gear |
KR101590886B1 (en) | 2014-11-10 | 2016-02-02 | (주) 에스알메탈 | Reel drag manufacturing method of fishing and its manufacturing equipment |
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CN108189903A (en) * | 2017-11-28 | 2018-06-22 | 江阴市永兴机械制造有限公司 | A kind of opening internal spline and its manufacturing method |
CN108247304A (en) * | 2018-01-12 | 2018-07-06 | 中国航发哈尔滨东安发动机有限公司 | The method for promoting teeth directional precision after internal spline is heat-treated |
CN110153645B (en) * | 2019-04-24 | 2020-09-15 | 武汉船用机械有限责任公司 | Method for processing tiller |
DE102019129724A1 (en) * | 2019-11-05 | 2021-05-06 | Schaeffler Technologies AG & Co. KG | Planet carrier with segmented spline and integrated spacer elements, kit of planetary gear with shaft and method for producing a planetary spline |
CN113732637B (en) * | 2021-09-26 | 2022-04-26 | 中信重工机械股份有限公司 | Large-diameter split type thin-wall gear ring machining method |
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US2027922A (en) * | 1935-05-29 | 1936-01-14 | Duro Metal Prod Co | Method of making wrench sockets |
US4452060A (en) * | 1981-04-22 | 1984-06-05 | Hitachi, Ltd. | Method of processing cylindrical surface |
US5732586A (en) * | 1996-09-19 | 1998-03-31 | Ford Global Technologies, Inc. | Cold extrusion for helical gear teeth |
-
2002
- 2002-06-28 JP JP2002190385A patent/JP2004034037A/en active Pending
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2003
- 2003-06-16 US US10/461,918 patent/US20040035000A1/en not_active Abandoned
- 2003-06-24 DE DE10328368A patent/DE10328368A1/en not_active Ceased
- 2003-06-24 CN CNA031487297A patent/CN1468681A/en active Pending
Patent Citations (3)
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US2027922A (en) * | 1935-05-29 | 1936-01-14 | Duro Metal Prod Co | Method of making wrench sockets |
US4452060A (en) * | 1981-04-22 | 1984-06-05 | Hitachi, Ltd. | Method of processing cylindrical surface |
US5732586A (en) * | 1996-09-19 | 1998-03-31 | Ford Global Technologies, Inc. | Cold extrusion for helical gear teeth |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8136380B2 (en) | 2007-09-26 | 2012-03-20 | Aisin Aw Co., Ltd. | Spline member manufacturing apparatus and manufacturing method |
US20140270921A1 (en) * | 2013-03-12 | 2014-09-18 | Johnson Electric S.A. | Hybrid torque transmission mechanism |
US9482285B2 (en) * | 2013-03-12 | 2016-11-01 | Johnson Electric S.A. | Hybrid torque transmission mechanism |
CN105108456A (en) * | 2015-08-31 | 2015-12-02 | 重庆创精温锻成型有限公司 | Manufacturing method of new-energy automobile drive motor shaft |
US10989294B2 (en) * | 2019-01-14 | 2021-04-27 | Schaeffler Technologies AG & Co. KG | Planetary drive assembly and method of connecting a planet carrier to a splined part |
Also Published As
Publication number | Publication date |
---|---|
DE10328368A1 (en) | 2004-01-22 |
CN1468681A (en) | 2004-01-21 |
JP2004034037A (en) | 2004-02-05 |
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Owner name: AISIN AW CO., LTD., JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:NAKAJIMA, MASAKI;TERAO, ARIYOSHI;SUZUKI, TOMOHIDE;REEL/FRAME:014700/0747 Effective date: 20030922 |
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