NHK Spring Co.

Japan

NHK Spring Co.

Japan

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A steel has a predetermined chemical composition with a balance being Fe and incidental impurities, wherein a sum of Cu content and Ni content is 0.15 mass % or more, and a crystal grain size after forming into a stabilizer shape and quenching is in a range of 7.5 to 10.5 in prior austenite crystal grain size number. Thus, a highly durable stabilizer steel that has a tensile strength of 1200 MPa or more and excellent normal-temperature and low-temperature toughness and is used in an environmentally friendly manufacturing process at lower cost can be realized.


Patent
NHK Spring Co. | Date: 2017-04-26

Provided is a coiled spring assembly, capable of properly engaging a seat for a coiled spring as a seat member with a coiled spring to prevent forced interference between an end turn of the coiled spring and the seat for the coiled spring and increase durability. The coiled spring (3) has an end turn (9) (11) formed up to a first turn with a reduced diameter and a transition portion (13) (15) with a diameter gradually increasing from the end turn (9) (11) to a body portion (7), the seat (5) for the coiled spring has a seat portion (17), a mounting shaft portion (19), and an enlarged diameter portion (21), the mounting shaft portion (19) has an axial length defining a gap or a zero-gap between the enlarged diameter portion (21) of the seat (5) for the coiled spring and the end turn in a free state in which the end turn (9) (11) is fitted to the mounting shaft portion and the bearing surface (9a) (11a) of the end turn (9) (11) is in contact with the receiving surface (17a) of the seat portion (17), and the transition portion (13) (15) circumvents the enlarged diameter portion (21) while the bearing surface (9a) (11a) of the end turn (9) (11) is in contact with the receiving surface (17a) of the seat portion (17).


Patent
NHK Spring Co. | Date: 2015-05-29

A method of manufacturing a laminate in which a spray coating film made of a material different from a base material is laminated on the base material includes: a base material heating step of heating the base material; an intermediate layer forming step of forming, on a surface of the heated base material, an intermediate layer made of a material different from the base material and the spray coating film; and a spray coating film forming step of forming the spray coating film on a surface of the intermediate layer.


A vertical motion impeller-type shot peening device performs a second shot peening to a coil spring including first shot peening indentations. The vertical motion impeller-type shot peening device includes a workpiece holding mechanism including a lower end turn support and an upper end turn support, a stress applying mechanism which compresses the coil spring, a rotation mechanism, and a projection mechanism which includes a pair of vertically movable impeller units. A first rough surface including first shot peening indentations is formed on a part of end turn portions of the coil spring. A second rough surface including second shot peening indentations is formed on the entire surface of wire except for the first rough surface.


Patent
NHK Spring Co. | Date: 2017-06-14

A contact probe according to the present invention is a needle-shape conductive connection terminal that is extensible and compressible in a longitudinal direction, and includes: a first plunger including a first tip portion configured to contact with an electrode of a contact target, and a first base end portion that extends from the first tip portion; a second plunger including a second tip portion configured to contact with an electrode of a contact target, and a second base end portion that extends from the second tip portion, wherein a line passing through a central axis of the second base end portion intersects with a line passing through a central axis of the second tip portion, the second base end portion having elasticity and configured to contact with the first base end portion; and a coil spring that is made from a winding of a wire, through which the first base end portion and the second base end portion are inserted, couples the first tip portion and the second tip portion such that the central axes of the first tip portion and the second tip portion become substantially in parallel, and is extensible and compressible in the longitudinal direction.


Patent
Nhk Spring Co. | Date: 2017-02-28

According to one embodiment, a vehicle suspension member includes a body of a vehicle suspension member made of a metal, a first layer provided to cover a surface of the body and a second layer provided to cover at least a portion of a surface of the first layer. The first layer includes an epoxy resin, and the second layer includes an epoxy resin and a fluororesin.


A vertical motion impeller-type shot peening device (50) performs a second shot peening to a coil spring (10) including first shot peening indentations (20). The vertical motion impeller-type shot peening device (50) includes a workpiece holding mechanism (52) including a lower end turn support (84, 85) and an upper end turn support (95, 96), a stress applying mechanism (90) which compresses the coil spring (10), a rotation mechanism (100) which allows the coil spring (10) to rotate around the vertical axis, and a projection mechanism (57) which includes a pair of vertically movable impeller units (55, 56). A first rough surface (21) including first shot peening indentations (20) is formed on a part of end turn portions (10a, 10b) of the coil spring (10). A second rough surface (31) including second shot peening indentations (30) is formed on the entire surface of wire (11) except for the first rough surface (21).


The present invention provides a stabilizer manufacturing apparatus (S) that is adapted to bond a rubber bush (3), which is a bush made of rubber disposed between a stabilizer (1) and a vehicle body, to a rubber bush bonding location (1s) where an adhesive layer of the stabilizer (1) is formed. The stabilizer manufacturing apparatus is provided with: a curing furnace (R) for heating the stabilizer (1), which is conveyed by a manufacturing line conveying unit (4) and has the rubber bush bonding location (1s) with which the rubber bush (3) is press-contacted, and performing the bonding; a heat source device (5) that heats air; a blower device (f1, f2, f3) that sends the air heated by the heat source device (5) as hot air; and a plurality of nozzles (7) that are disposed along the manufacturing line conveying unit (4) in the curing furnace (R) and blow the hot air against, at a near position from, a location (1a1) in the vicinity of the rubber bush bonding location (1s) of the stabilizer (1).


Patent
Nhk Spring Co. | Date: 2017-01-09

A thin circuit board such as a flexure has a metal support layer forming a substrate, a base insulating layer provided on the metal support layer, a wiring layer being wiring traces provided on the base insulating layer, a cover insulating layer covering the wiring layer, internal terminals provided to the respective wiring traces and sequentially arranged side by side, each one internal terminal of said internal terminals used to be solder-bonded to a corresponding external terminal through solder material, and a wall provided for the solder material on at least any one of adjacent internal terminals of said internal terminals.


Patent
NHK Spring Co. | Date: 2017-07-05

A vehicle suspension member (10) comprises a body (11) of a vehicle suspension member made of a metal, a first layer (121) provided to cover the surface of the body (11) and a second layer (122) provided to cover at least a portion of the surface of the first layer (121). The first layer (121) comprises an epoxy resin and the second layer (122) comprises an epoxy resin and a fluororesin.

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