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公开(公告)号：EP3034903A4
公开(公告)日：2017-04-19
申请号：EP14836649
申请日：2014-07-01
Applicant: NHK SPRING CO LTD
Inventor： YAMAMOTOYA KENJI , ENOMOTO HIDETO , TAKAHASHI KEN , SATO TOSHIAKI , SUGIYAMA MITSUHIRO , KOBAYASHI YOSHIO , INAGE TAICHI , KATO TOMOTAKE , NISHIKAWA AKIHIKO , UMEZAWA MASAHIRO , AYADA MICHIHIKO , KAJIGAYA SUGURU
CPC classification number: B60G11/14 , B60G15/062 , B60G2200/142 , B60G2200/22 , B60G2202/12 , B60G2202/312 , B60G2204/1242 , B60G2204/1246 , B60G2206/42 , B60G2206/426 , B60G2206/724 , F16F1/043 , F16F1/06 , F16F9/32
Abstract: A suspension coil spring includes a lower end turn portion (42), an upper end turn portion (44), and a helical effective portion (45) formed between the end turn portions (42, 44). The lower end turn portion (42) includes a first portion (42a) which contacts a lower spring seat irrespective of a load, and a second portion (42b) which contacts the lower spring seat or is separated from the same according to the load. The wire diameter of the second portion (42b) is greater than that of the first portion (42a) and an average wire diameter of the effective portion (45). The upper end turn portion (44) includes a third portion (44a) which contacts an upper spring seat irrespective of a load, and a fourth portion (44b) which contacts the upper spring seat or is separated from the same according to the load. The wire diameter of the fourth portion (44b) is greater that of the third portion (44a) and the average wire diameter of the effective portion (45).
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公开(公告)号：EP2921323A4
公开(公告)日：2016-07-27
申请号：EP13855147
申请日：2013-11-14
Applicant: NHK SPRING CO LTD
Inventor： YAMAMOTOYA KENJI , ENOMOTO HIDETO , TAKAHASHI KEN , SATO TOSHIAKI , SUGIYAMA MITSUHIRO , KOBAYASHI YOSHIO , INAGE TAICHI , KATO TOMOTAKE , NISHIKAWA AKIHIKO , UMEZAWA MASAHIRO , AYADA MICHIHIKO , KAJIGAYA SUGURU
CPC classification number: B60G15/062 , B60G11/14 , B60G2200/142 , B60G2202/12 , B60G2202/312 , B60G2206/42 , B60G2206/426 , F16F1/043
Abstract: A strut-type suspension (11) includes a compression coil spring (12), a lower spring seat (13), an upper spring seat (14), and a shock absorber (15) which passes through the inside of the compression coil spring (12). The compression coil spring (12) is disposed at a position offset to the outer side of a vehicle with respect to the shock absorber (15). The compression coil spring (12) is mounted in a vehicle body (30) in such a state that it is compressed between spring seats (13, 14). The compression coil spring (12) includes a large-diameter wire portion (40a) and a small-diameter wire portion (40b). The large-diameter wire portion (40a) is provided in a vehicle inner-side portion (12a) of the compression coil spring (12). The small-diameter wire portion (40b) is provided in a vehicle outer-side portion (12b). A wire diameter (d1) of the large-diameter wire portion (40a) is greater than a wire diameter (d2) of the small-diameter wire portion (40b).
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公开(公告)号：EP2921324A4
公开(公告)日：2016-07-27
申请号：EP13855183
申请日：2013-11-14
Applicant: NHK SPRING CO LTD
Inventor： YAMAMOTOYA KENJI , ENOMOTO HIDETO , TAKAHASHI KEN , SATO TOSHIAKI , SUGIYAMA MITSUHIRO , KOBAYASHI YOSHIO , INAGE TAICHI , KATO TOMOTAKE , NISHIKAWA AKIHIKO , UMEZAWA MASAHIRO , AYADA MICHIHIKO , KAJIGAYA SUGURU
CPC classification number: B60G3/14 , B60G11/14 , B60G15/06 , B60G21/051 , B60G2200/132 , B60G2200/21 , B60G2202/12 , B60G2204/1246 , B60G2206/42 , B60G2206/426 , F16F1/043 , F16F2238/026
Abstract: A knee-action-type suspension (11) is provided with an arm member (20), a compression coil spring (21), and a shock absorber (24). The arm member (20) is supported in such a way that it is pivotable in the upward and downward directions by a pivot (31) provided on an arm mounting portion (30). The coil spring (21) is arranged between spring seats (22, 23). The coil spring (21) is extended and retracted between a full-rebound state and a full-bump state in accordance with the magnitude of a load applied to a vehicle body. A wire (40) of the coil spring (21) includes a large-diameter wire portion (40a), a small-diameter wire portion (40b), and a wire diameter varying portion (40c). The large-diameter wire portion (40a) is provided in a first portion (21a) of the coil spring (21), which is on the side near to the pivot (31). The small-diameter wire portion (40b) is provided in a second portion (21b) of the coil spring (21), which is on the side far from the pivot (31). A wire diameter (d1) of the large-diameter wire portion (40a) is greater than a wire diameter (d2) of the small-diameter wire portion (40b).
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公开(公告)号：EP2444203A4
公开(公告)日：2014-10-22
申请号：EP10732238
申请日：2010-02-22
Applicant: NHK SPRING CO LTD
Inventor： TANGE AKIRA , OKADA HIDEKI , SUMIYOSHI ISAO , SUGIYAMA MITSUHIRO
Abstract: A spring wire (20) with hardness of 50 to 56 HRC is subjected to first and second shot peening processes (S6) (S7) within a warm working temperature range of 150 to 350°C. In the first shot peening process (S6), the first shot of a shot size of 1.0 mm or more is used. In the second shot peening process (S7), the second shot smaller in shot size than the first shot is used. Through these shot peening processes (S6) (S7), compressive residual stress is imparted to the spring wire (20). The spring wire (20) includes a residual stress increase part (T1 residual stress peak part (T3), and residual stress decrease part (T4). In the residual stress decrease part (T4), a part (B) including the compressive residual stress magnitude of which is equivalent to the magnitude of the compressive residual stress at the surface of the spring wire (20) exists at a position at a depth exceeding the permissible pit depth (R max ).
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