Patents by Inventor Shinichirou Kashiwagi
Shinichirou Kashiwagi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 6808312Abstract: A bearing device comprising a shaft body having an axially cylindrical portion in a free end side thereof and a rolling bearing fitted around an outer peripheral surface of the shaft body, wherein the cylindrical portion is bent and deformed radially outward by a rolling caulking to be caulked thereby on an outer end face of an inner ring of the rolling bearing, and a surface roughness of the inner peripheral surface of the cylindrical portion is set to 12.5 &mgr;m or less by a ten-point mean roughness (Rz).Type: GrantFiled: February 20, 2003Date of Patent: October 26, 2004Assignee: Koyo Seiko Co., Ltd.Inventors: Kazutoshi Toda, Shinichirou Kashiwagi, Tomohiro Ishii, Tadashi Mitarai, Daisaku Tomita
-
Publication number: 20040165804Abstract: A vehicle-use bearing apparatus including a hub wheel formed of steel material to which a wheel is mounted and a rolling bearing mounted to an outer periphery of the hub wheel. An end portion of the hub wheel is expanded radially outward toward an inner ring provided to the rolling bearing to be formed into a caulked portion and a percentage of sulfur content is adjusted to be 0.020% by weight or less in steel material of which the 10 caulked portion is formed.Type: ApplicationFiled: February 20, 2004Publication date: August 26, 2004Applicant: Koyo Seiko Co., Ltd.Inventors: Kazutoshi Toda, Shinichirou Kashiwagi, Tomohiro Ishii, Daisaku Tomita
-
Patent number: 6739758Abstract: A bearing device in which a rolling bearing is fitted on one axial end of a shaft and in which the one axial end of the shaft is caulked to fix the rolling bearing while preventing the same from coming out. The shape of the outer end face of the caulked portion is devised to maximize the resistance to the coming-out by the caulked portion.Type: GrantFiled: February 28, 2002Date of Patent: May 25, 2004Assignee: Koyo Seiko Co., Ltd.Inventors: Shinichirou Kashiwagi, Naoki Morimura, Kazutoshi Toda, Tadashi Mitarai, Nobuyoshi Murakami
-
Publication number: 20040093732Abstract: A bearing apparatus includes a hollow shaft provided around an outer peripheral surface with a bearing fitting region, and a rolling bearing having an inner ring fitted around the bearing fitting region of the hollow shaft. A shaft end of the hollow shaft is bent outwardly in a diametrical direction, thereby being caulked on an outer end surface of the inner ring. The bearing fitting region has a hardened layer in a region from a first position corresponding to an inner end surface of the inner ring of the rolling bearing to a second position before a position corresponding to an outer end surface of the inner ring, and has a non-hardened layer in another region from the outer end surface corresponding position of the inner ring to the shaft end. The second position representative of a caulked side end portion of the hardened layer is defined based on a predetermined relational expression.Type: ApplicationFiled: November 13, 2003Publication date: May 20, 2004Applicant: Koyo Seiko Co., Ltd.Inventors: Kazutoshi Toda, Masahiro Inoue, Kenji Takahashi, Teruyuki Kawatani, Shinichirou Kashiwagi, Teruyuki Wakisaka, Tadashi Mitarai
-
Publication number: 20040083612Abstract: A bearing is mounted on a hollow shaft of a hub wheel. A shaft end of the hollow shaft is deformed radially outward and caulked to an outer end face of an inner ring of the bearing. Between a first area in which a spline portion is formed and a second area in which a caulked portion is formed, between a bending starting point for bending the shaft end radially outward and an end face of the shaft end on an inner peripheral face of the hollow shaft, a third area for suppressing deformation of the inner peripheral face of the hollow shaft caused by the caulking is formed. The third area cushions deformation in the first area.Type: ApplicationFiled: October 23, 2003Publication date: May 6, 2004Applicant: Koyo Seiko Co., Ltd.Inventors: Kazutoshi Toda, Teruyuki Wakisaka, Kenji Takahashi, Teruyuki Kawatani, Shinichirou Kashiwagi
-
Patent number: 6722786Abstract: A vehicle-use bearing apparatus including a hub wheel formed of steel material to which a wheel is mounted and a rolling bearing mounted to an outer periphery of the hub wheel. An end portion of the hub wheel is expanded radially outward toward an inner ring provided to the rolling bearing to be formed into a caulked portion and a percentage of sulfur content is adjusted to be 0.020% by weight or less in steel material of which the caulked portion is formed.Type: GrantFiled: December 5, 2001Date of Patent: April 20, 2004Assignee: Koyo Seiko Co., Ltd.Inventors: Kazutoshi Toda, Shinichirou Kashiwagi, Tomohiro Ishii, Daisaku Tomita
-
Publication number: 20040022470Abstract: In a bearing device in which a free end of a shaft body to which a rolling bearing is mounted is bent outward in its radial direction into a shape to be pushed against an end face of an inner ring of the rolling bearing so as to prevent the rolling bearing from falling out, a raceway surface of the inner ring of the rolling bearing is subjected to hardening treatment, and other portion of the inner ring is made of row material which is not hardened. With this arrangement, the caulked portion formed by the caulking plastically deforms the relatively soft inner peripheral corner of the inner ring and as a result, the caulked portion and the inner peripheral corner are adhered to each other strongly.Type: ApplicationFiled: July 29, 2003Publication date: February 5, 2004Applicant: Koyo Seiko Co., Ltd.Inventors: Kazutoshi Toda, Masaru Deguchi, Shinichirou Kashiwagi, Tadashi Mitarai, Tomohiro Ishii, Daisaku Tomita
-
Patent number: 6672769Abstract: A bearing apparatus includes a hollow shaft provided around an outer peripheral surface with a bearing fitting region, and a rolling bearing having an inner ring fitted around the bearing fitting region of the hollow shaft. A shaft end of the hollow shaft is bent outwardly in a diametrical direction, thereby being caulked on an outer end surface of the inner ring. The bearing fitting region has a hardened layer in a region from a first position corresponding to an inner end surface of the inner ring of the rolling bearing to a second position before a position corresponding to an outer end surface of the inner ring, and has a non-hardened layer in another region from the outer end surface corresponding position of the inner ring to the shaft end. The second position representative of a caulked side end portion of the hardened layer is defined based on a predetermined relational expression.Type: GrantFiled: July 10, 2001Date of Patent: January 6, 2004Assignee: Koyo Seiko Co., Ltd.Inventors: Kazutoshi Toda, Masahiro Inoue, Kenji Takahashi, Teruyuki Kawatani, Shinichirou Kashiwagi, Teruyuki Wakisaka, Tadashi Mitarai
-
Publication number: 20030185479Abstract: A bearing device comprising a shaft body having an axially cylindrical portion in a free end side thereof and a rolling bearing fitted around an outer peripheral surface of the shaft body, wherein the cylindrical portion is bent and deformed radially outward by a rolling caulking to be caulked thereby on an outer end face of an inner ring of the rolling bearing. An inner peripheral surface of the cylindrical portion is formed by a turning work, and a residual stress left in a surface layer of the inner peripheral surface of the cylindrical portion by the turning work is set to a value capable of restraining a crack generation ratio in the inner peripheral surface to less than a predetermined rate, desirably to not more than 5 kgf/mm2.Type: ApplicationFiled: February 20, 2003Publication date: October 2, 2003Inventors: Kazutoshi Toda, Shinichirou Kashiwagi, Tomohiro Ishii, Tadashi Mitarai, Daisaku Tomita
-
Patent number: 6619852Abstract: In a bearing device in which a free end of a shaft body to which a rolling bearing is mounted is bent outward in its radial direction into a shape to be pushed against an end face of an inner ring of the rolling bearing so as to prevent the rolling bearing from falling out, a raceway surface of the inner ring of the rolling bearing is subjected to hardening treatment, and other portion of the inner ring is made of raw material which is not hardened. With this arrangement, the caulked portion formed by the caulking plastically deforms the relatively soft inner peripheral corner of the inner ring and as a result, the caulked portion and the inner peripheral corner are adhered to each other strongly.Type: GrantFiled: March 5, 2001Date of Patent: September 16, 2003Assignee: Koyo Seiko Co., Ltd.Inventors: Kazutoshi Toda, Masaru Deguchi, Shinichirou Kashiwagi, Tadashi Mitarai, Tomohiro Ishii, Daisaku Tomita
-
Publication number: 20030138176Abstract: A rolling bearing device comprising an outer ring member, an inner ring member concentric with the outer ring member in the diameter direction, a plurality of rolling elements disposed so as to freely roll between the outer ring member and the inner ring member, and an axial member which is inserted into the center hole of the inner ring member and which has a flange outward in the diameter direction on the outer peripheral surface thereof, wherein the inner ring member has a curved chamfer on its end surface on the inner peripheral surface side thereof, the axial member is caulked to the end surface of the inner ring member, the amount of decentering between the center of the inner ring members in the diameter direction and the center of the chamfer in the diameter direction is set to the range of over 0 &mgr;m and not more than 200 &mgr;m.Type: ApplicationFiled: January 17, 2003Publication date: July 24, 2003Applicant: Koyo Seiko Co., Ltd.Inventors: Takahiro Umekawa, Teruyuki Wakisaka, Shinichirou Kashiwagi
-
Publication number: 20030072511Abstract: A rolling bearing unit comprises a shaft body, an inner ring mounted on the shaft body, an outer ring concentric with the inner ring, and a plurality of balls between the inner ring and the outer ring. A caulking portion to be caulked onto the outer end face of the inner ring is formed on the shaft body. A pre-load is applied to the balls to fix the inner ring to the shaft body. The retained austenite amount of an edge of the inner ring in the vicinity of the caulking portion is set between 3% or more and 20% or less.Type: ApplicationFiled: October 9, 2002Publication date: April 17, 2003Applicant: Koyo Seiko Co., Ltd.Inventors: Kazutoshi Toda, Shinichirou Kashiwagi, Daisaku Tomita
-
Publication number: 20020172444Abstract: A bearing apparatus comprises a hollow shaft provided around its outer peripheral surface with a bearing fitting region, and a rolling bearing having an inner ring fitted around the bearing fitting region of the hollow shaft. A shaft end of the hollow shaft is bent outwardly in a diametrical direction, thereby being caulkd on an outer end surface of the inner ring of the rolling bearing. The bearing fitting region has a hardened layer in its region from an inner end surface corresponding position of the inner ring of the rolling bearing to a portion before an outer end surface corresponding position, and has a non-hardened layer in its region from the outer end surface corresponding position of the inner ring to the shaft end of the hollow shaft. A position of a caulkd side end portion of the hardened layer is defined based on a predetermined relational expression.Type: ApplicationFiled: July 10, 2001Publication date: November 21, 2002Applicant: Koyo Seiko Co., Ltd.Inventors: Kazutoshi Toda, Masahiro Inoue, Kenji Takahashi, Teruyuki Kawatani, Shinichirou Kashiwagi, Teruyuki Wakisaka, Tadashi Mitarai
-
Publication number: 20020085782Abstract: A bearing device in which a rolling bearing is fitted on one axial end of a shaft and in which the one axial end of the shaft is caulked to fix the rolling bearing while preventing the same from coming out. The shape of the outer end face of the caulked portion is devised to maximize the resistance to the coming-out by the caulked portion.Type: ApplicationFiled: February 28, 2002Publication date: July 4, 2002Applicant: Koyo Seiko Co., Ltd.Inventors: Shinichirou Kashiwagi, Naoki Morimura, Kazutoshi Toda, Tadashi Mitarai, Nobuyoshi Murakami
-
Publication number: 20020081051Abstract: A bearing device in which a rolling bearing is fitted on one axial end of a shaft and in which the one axial end of the shaft is caulked to fix the rolling bearing while preventing the same from coming out. The shape of the outer end face of the caulked portion is devised to maximize the resistance to the coming-out by the caulked portion.Type: ApplicationFiled: February 28, 2002Publication date: June 27, 2002Applicant: Koyo Seiko Co., Ltd.Inventors: Shinichirou Kashiwagi, Naoki Morimura, Kazutoshi Toda, Tadashi Mitarai, Nobuyoshi Murakami
-
Publication number: 20020067875Abstract: A vehicle-use bearing apparatus including a hub wheel formed of steel material to which a wheel is mounted and a rolling bearing mounted to an outer periphery of the hub wheel. An end portion of the hub wheel is expanded radially outward toward an inner ring provided to the rolling bearing to be formed into a caulked portion and a percentage of sulfur content is adjusted to be 0.020% by weight or less in steel material of which the caulked portion is formed.Type: ApplicationFiled: December 5, 2001Publication date: June 6, 2002Applicant: Koyo Seiko Co., Ltd.Inventors: Kazutoshi Toda, Shinichirou Kashiwagi, Tomohiro Ishii, Daisaku Tomita
-
Patent number: 6398419Abstract: A bearing device in which a rolling bearing is fitted on one axial end of a shaft and in which the one axial end of the shaft is caulked to fix the rolling bearing while preventing the same from coming out. The shape of the outer end face of the caulked portion is devised to maximize the resistance to the coming-out by the caulked portion.Type: GrantFiled: September 8, 1999Date of Patent: June 4, 2002Assignee: Koyo Seiko Co., Ltd.Inventors: Shinichirou Kashiwagi, Naoki Morimura, Kazutoshi Toda, Tadashi Mitarai, Nobuyoshi Murakami
-
Patent number: 6363799Abstract: There is disclosed a bearing device in which a double row angular contact ball bearing is mounted to an outer periphery of a hub wheel, a caulking portion is bent diametrically outward and caulked on an end face of an inner ring of a bearing, thereby preventing the bearing from falling out from the bearing device and to applying a pre-load to the bearing. An axially outer edge of the inner ring is chamfered roundly, the caulking portion is provided at its shaft end with a small-diameter portion, and a starting point of the small-diameter portion is located closer to an axially central portion than a chamfer-starting point of the axially outer edge of the inner ring.Type: GrantFiled: August 4, 2000Date of Patent: April 2, 2002Assignee: Koyo Seiko Co., Ltd.Inventors: Kazutoshi Toda, Tomohiro Ishii, Shinichirou Kashiwagi, Tadashi Mitarai, Makoto Miyazaki
-
Publication number: 20020006239Abstract: A bearing is mounted to a hollow shaft provided to a hub wheel. A shaft end of the hollow shaft is deformed radially outward and caulked to an outer end face of an inner ring of the bearing. Between a first area in which a spline portion is formed and a second area in which a caulked portion is formed between a bending starting point for bending the shaft end radially outward and an end face of the shaft end on an inner peripheral face of the hollow shaft, a third area for suppressing deformation of the inner peripheral face of the hollow shaft caused by the caulking is formed. The third area cushions deformation in the first area.Type: ApplicationFiled: July 10, 2001Publication date: January 17, 2002Applicant: Koyo Seiko Co., Ltd.Inventors: Kazutoshi Toda, Teruyuki Wakisaka, Kenji Takahashi, Teruyuki Kawatani, Shinichirou Kashiwagi