Patents Assigned to Daido Metal Company Ltd.
  • Patent number: 11098761
    Abstract: A sliding member incudes a back-metal layer and a sliding layer made of a copper alloy. The back-metal layer is made of a hypoeutectoid steel including 0.07 to 0.35 mass % of carbon, and has a structure including a ferrite phase and pearlite. The back-metal layer includes a pore existing region including a plurality of closed pores having an average size of 1 to 10 ?m. The pore existing region extends from the bonding surface toward an inner portion of the back-metal layer and having a thickness of 2 to 20 ?m. At least a part of the plurality of closed pores has contour that is partially formed by the bonding surface in a cross-sectional view. A ratio V2/V1 of a total volume V2 of the closed pores to a volume V1 of the pore existing region is 0.02 to 0.08.
    Type: Grant
    Filed: September 16, 2020
    Date of Patent: August 24, 2021
    Assignee: DAIDO METAL COMPANY LTD.
    Inventor: Ryo Hanai
  • Patent number: 11035408
    Abstract: A half thrust bearing for a crankshaft includes a back metal layer defining a first surface and a second surface, and a bearing alloy layer on the first surface to form a slide surface, and thrust relieves formed adjacent to both circumferential end surfaces and having a thrust relief surface consisting of the bearing alloy layer. Each circumferential end surface of the back metal layer includes an exposed end surface adjacent to the second surface, and a transition surface adjacent to the first surface. The bearing alloy layer further includes an extension portion covering the transition surface and having extension end surface adjacent to the exposed end surface, the extension end surface and the exposed end surface extending at least partly in the same plane.
    Type: Grant
    Filed: January 6, 2020
    Date of Patent: June 15, 2021
    Assignee: DAIDO METAL COMPANY LTD.
    Inventor: Shiho Goto
  • Patent number: 10995296
    Abstract: A sliding member includes a back metal layer and a sliding layer on the back metal layer. The sliding layer includes a synthetic resin matrix and graphite particles dispersed in the matrix in a volume ratio of 5-50% of that of the sliding layer. The graphite particles are composed of spheroidal and flake-like particles. The flake-like particles have a volume ratio of 10-40% of total graphite particles. The spheroidal particles have a cross-sectional structure with a plurality of AB planes of a graphite crystal laminated along a curved particle surface, from the surface toward a center direction. The flake-like graphite particles have a cross-sectional structure with the plurality of AB planes laminated in a thickness direction of the thin plate shape. The spheroidal particles have an average particle size of 3-50 ?m, and the flake-like graphite particles have an average particle size of 1-25 ?m.
    Type: Grant
    Filed: February 14, 2017
    Date of Patent: May 4, 2021
    Assignee: DAIDO METAL COMPANY LTD.
    Inventor: Takayoshi Yamauchi
  • Patent number: 10955003
    Abstract: Provided is a sliding member including: a back-metal layer and a sliding layer including a copper alloy. The back-metal layer includes a hypoeutectoid steel including 0.07 to 0.35 mass % of carbon and has a structure including a ferrite phase and pearlite. The back-metal layer has a high ferrite phase portion at a bonding surface between the back-metal layer and the sliding layer. A volume ratio Pc and a volume ratio Ps satisfy Ps/Pc?0.4, where the volume ratio Pc is a volume ratio of pearlite in the structure at a center portion in a thickness direction of the back-metal layer, and the volume ratio Ps is a volume ratio of pearlite in the high ferrite phase portion.
    Type: Grant
    Filed: February 15, 2019
    Date of Patent: March 23, 2021
    Assignee: DAIDO METAL COMPANY LTD
    Inventors: Asako Ikegami, Takaaki Kitahara
  • Patent number: 10948010
    Abstract: A bearing device includes a base plate, a plurality of sliding pads and support members. The sliding pad is movable relative to the base plate. The support members are located between the base plate and the sliding pad, and shift a position of a load supporting point in a circumferential direction of the base plate, the load supporting point serving as a point for supporting a load received from the sliding pad. When any virtual flat surface perpendicular to a rotating shaft member is considered as a reference surface, and when a distance from the reference surface through the load supporting point to an end of the sliding pad at the opposite side to the base plate is defined as a setting distance, a position of the load supporting point is shifted in a circumferential direction of the base plate with no change in the setting distance.
    Type: Grant
    Filed: July 25, 2019
    Date of Patent: March 16, 2021
    Assignee: DAIDO METAL COMPANY LTD.
    Inventor: Yuji Kawaai
  • Patent number: 10927887
    Abstract: A resin coating layer has a shape line that indicates the shape of a surface and is divided by virtual straight lines parallel to the X axis and setting an area of recessed sections that protrudes below the virtual straight lines and an area of protruding sections that protrudes above the virtual straight lines. A virtual straight line at a position at which the area totals for the area of recessed sections and the area of protruding sections are equal is defined as the average line for unevenness. Areas that protrude downwards from this average line for unevenness are defined as recessed sections and areas that protrude above this average line for unevenness are defined as protruding sections. The average area Sa for one recessed section is 4-120 ?m2 and the number M of recessed sections between two points having a distance of 1 mm therebetween is 3-20.
    Type: Grant
    Filed: February 24, 2016
    Date of Patent: February 23, 2021
    Assignee: DAIDO METAL COMPANY LTD.
    Inventors: Shigeru Inami, Tetsuya Ogawa
  • Patent number: 10907683
    Abstract: A half thrust bearing includes a back metal layer, a bearing alloy layer defining a slide surface, and two thrust relieves formed adjacent to both circumferential end surfaces of the half thrust bearing and each including a thrust relief surface. The back metal layer includes an exposed end face configuring at least a part of the circumferential end surface, an exposed slant surface configuring at least a part of the thrust relief surface, and a transition surface formed between the exposed end face and the exposed slant surface. The transition surface is covered with a cover member including a cover end surface configuring at least a part of the circumferential end surface and a cover slant surface configuring at least a part of the thrust relief surface.
    Type: Grant
    Filed: January 6, 2020
    Date of Patent: February 2, 2021
    Assignee: DAIDO METAL COMPANY LTD.
    Inventor: Shiho Goto
  • Patent number: 10900521
    Abstract: A sliding member includes a bearing alloy layer, a solid lubricant layer, particles and a covering portion. The solid lubricant layer is provided on a sliding surface side of the bearing alloy layer and is deposited on the bearing alloy layer. The particles form the solid lubricant layer and are made of metal sulfide. The covering portion is provided over outermost surfaces of the particles on the sliding surface side and are made of metal oxide including the same metal element as a metal element constituting the particles.
    Type: Grant
    Filed: October 16, 2019
    Date of Patent: January 26, 2021
    Assignee: DAIDO METAL COMPANY LTD.
    Inventors: Yuma Haneda, Manabu Izumida, Erina Yasuda, Tomoyasu Shiroya
  • Patent number: 10876576
    Abstract: The purpose of the present invention is to provide: a slide member in which the bonding strength between a Bi-containing copper alloy layer and a substrate is enhanced; and a method for manufacturing the slide member. The slide member according to the present invention has a substrate and a copper alloy layer. The copper alloy layer comprises a copper alloy containing 4.0-25.0 mass % of Bi and has a structure in which Bi phases are scattered in a copper alloy structure. The volume ratio of Bi phases in the region of the copper alloy layer extending 10 ?m from the bonding interface with the substrate is not more than 2.0%. The slide member is manufactured by casting a molten copper alloy onto the substrate and causing the copper alloy to unidirectionally solidify.
    Type: Grant
    Filed: June 8, 2017
    Date of Patent: December 29, 2020
    Assignee: DAIDO METAL COMPANY LTD.
    Inventor: Kazuaki Toda
  • Patent number: 10844462
    Abstract: Provided are a slide material in which the joining strength between a Bi-containing copper alloy layer and a substrate is improved, and a method for manufacturing the slide material. The slide material according to the present invention has a substrate and a copper alloy layer. The copper alloy layer comprises a copper alloy containing 4.0-25.0 mass % of Bi and has a structure in which Bi phases are scattered in a copper alloy structure. The contact area ratio of Bi phases of the copper alloy layer at the joining interface with the substrate is not more than 2.0%. The slide material is manufactured by casting a molten copper alloy onto a substrate and causing the copper alloy to solidify unidirectionally.
    Type: Grant
    Filed: June 8, 2017
    Date of Patent: November 24, 2020
    Assignee: DAIDO METAL COMPANY LTD.
    Inventor: Kazuaki Toda
  • Patent number: 10823224
    Abstract: A bearing member according to an embodiment of the present invention is formed into a single cylindrical shape or a cylindrical shape divided into arcs along a circumferential direction, and is assembled to a housing on an outer peripheral side of the bearing member. The bearing member includes an outer peripheral surface provided on a side opposed to an inner peripheral surface of the housing. A maximum height Rz (?m) of a surface roughness of the outer peripheral surface is set as 2.00 ?m?Rz?4.00 ?m, and a value of ratio between an average protruding-peak height Rpk (?m) and a load length rate Mr1 (%), that is a load curve parameter for the surface roughness is set as 0.010?Rpk/Mr1?0.100.
    Type: Grant
    Filed: November 8, 2019
    Date of Patent: November 3, 2020
    Assignee: DAIDO METAL COMPANY LTD.
    Inventors: Shigeru Inami, Manabu Izumida, Yukihiro Ito, Takahito Nakagawa
  • Patent number: 10808759
    Abstract: A sliding member of the present embodiment includes a bearing alloy layer and a coating layer provided on a sliding surface side thereof. The coating layer has a resin binder with sulfide particles dispersed therein. A covering portion is provided over specific particles and is made of metal oxide comprising the same metal element as a metal element constituting the sulfide particles. When measured by an X-ray photoelectron spectroscopy and an X-ray diffraction method, a ratio of a peak height of the metal oxide to a peak height of metal sulfide by the X-ray photoelectron spectroscopy is from 0.10 to 0.50, and a ratio of the peak height of the metal oxide to the peak height of the metal sulfide by the X-ray diffraction method is 0.10 or less.
    Type: Grant
    Filed: October 16, 2019
    Date of Patent: October 20, 2020
    Assignee: DAIDO METAL COMPANY LTD.
    Inventors: Kazuki Sakai, Shigeru Inami, Kenji Nimura
  • Patent number: 10794426
    Abstract: Provided is a partially-cylindrical sliding member including a sliding layer including fibrous particles having an average particle size of 5-25 ?m dispersed in a synthetic resin at a volume ratio of 10-35% of the sliding layer. The particles having a major axis length ?20 ?m are included at a volume ratio of ?10% to total particles. A sliding surface side area is defined from the sliding surface and has a thickness of 25% of a sliding layer thickness T, where the fibrous particles having a major axis length of ?20 ?m have a dispersion index of 1.1-6. An interface side area is defined from the interface and has a thickness of 25% of T, where the dispersion index is 1.1-6. An intermediate area is defined between the both areas, where the dispersion index is 0.1 to less than 1.
    Type: Grant
    Filed: March 7, 2018
    Date of Patent: October 6, 2020
    Assignee: DAIDO METAL COMPANY LTD.
    Inventor: Takayoshi Yamauchi
  • Patent number: 10760031
    Abstract: A resin composition for use in a sliding member, which has higher seizing resistance while maintaining abrasion resistance. The sliding resin composition includes: a resin binder; a solid lubricant; and a protecting and reinforcing agent that is harder and brittler than the resin binder. As the protecting and reinforcing agent, aggregates of particles harder than the resin binder are used. The amount of the protecting and reinforcing agent contained is 1 vol. % or more but 20 vol. % or less of the entire sliding resin composition. The particles harder than the resin binder have an average particle diameter of 10 nm or more but 100 nm or less that is smaller than that of the solid lubricant.
    Type: Grant
    Filed: May 15, 2015
    Date of Patent: September 1, 2020
    Assignee: DAIDO METAL COMPANY LTD.
    Inventors: Hiroki Kobayakawa, Erina Yasuda
  • Patent number: 10704590
    Abstract: Provided is a semi-annular shaped half thrust bearing. The half thrust bearing has a sliding surface and a back surface opposite to the sliding surface. The sliding surface includes a plurality of recesses. Each recess has a recess surface recessed from the sliding surface toward the back surface. The recess surface is convex toward the back surface in cross-sectional view in a center line direction of the half thrust bearing. The recess surface includes a plurality of grooves. The grooves are recessed from the recess surface toward the back surface. The grooves extend in the center line direction so that smooth surfaces and the grooves are alternately arranged on the recess surface in a horizontal direction of the half thrust bearing.
    Type: Grant
    Filed: January 28, 2019
    Date of Patent: July 7, 2020
    Assignee: DAIDO METAL COMPANY LTD.
    Inventors: Seiji Amano, Toru Watanabe
  • Patent number: 10704591
    Abstract: Provided is a semi-cylindrical shaped half bearing. The half bearing has an inner surface forming a sliding surface. The sliding surface includes a plurality of recesses. Each recess has a smooth recess surface recessed from the sliding surface toward an outer diameter side of the half bearing. The recess surface forms a convex curve toward the outer diameter side of the half bearing in a cross-sectional view in any direction perpendicular to the sliding surface. The recess surface includes a plurality of circumferential grooves. The circumferential grooves are recessed from the recess surface toward the outer diameter side of the half bearing. The circumferential grooves extend along a circumferential direction of the half bearing so that smooth surfaces and the circumferential grooves are alternately arranged on the recess surface.
    Type: Grant
    Filed: May 20, 2019
    Date of Patent: July 7, 2020
    Assignee: DAIDO METAL COMPANY LTD.
    Inventors: Seiji Amano, Toru Watanabe
  • Patent number: 10641317
    Abstract: Provided is a semi-annular-shaped half thrust bearing having a sliding surface for receiving an axial force and a back surface opposite to the sliding surface. The sliding surface includes a plurality of recesses. Each recess has a recess surface recessed from the sliding surface toward the back surface of the half thrust bearing. The recess surface is convex toward the back surface of the half thrust bearing in cross-sectional view in a circumferential direction of the half thrust bearing. The recess surface includes a plurality of circumferential grooves recessed from the recess surface toward the back surface of the half thrust bearing. The circumferential grooves extend along the circumferential direction of the half thrust bearing, and smooth surfaces and the circumferential grooves are alternately arranged on the recess surface.
    Type: Grant
    Filed: November 20, 2018
    Date of Patent: May 5, 2020
    Assignee: DAIDO METAL COMPANY LTD.
    Inventors: Seiji Amano, Toru Watanabe
  • Patent number: 10612594
    Abstract: A main bearing for a journal portion of a crankshaft includes a pair of upper and lower half bearings forming a cylindrical shape. Each half bearing includes a main cylindrical portion including a circumferentially central portion and having a slide surface, and crush reliefs formed on both circumferential sides of the slide surface. Only the upper half bearing includes an oil groove on its inner peripheral surface, and an oil hole pierced from the oil groove to an outer peripheral surface. The lower half bearing includes an axial groove on the slide surface that is arranged apart from the circumferentially central portion toward the forward side by a circumferential angle of 10° or more, and apart from the crush relief located on the forward side by a circumferential angle of 10° or more.
    Type: Grant
    Filed: September 26, 2018
    Date of Patent: April 7, 2020
    Assignee: DAIDO METAL COMPANY LTD.
    Inventors: Seiji Amano, Shinichi Sakurai
  • Patent number: 10601283
    Abstract: A cooling portion has an air inlet into which cooling air flows and is positioned in a preset range. When a distance from the upper to lower ends of an oil chamber in the axial direction of a rotating shaft member is h, and the shortest distance between an outer peripheral face of a casing and an inner peripheral face of a cover is a, the preset range is set in the following manner. Specifically, the preset range is set between ¼h upward and 5/4h downward relative to the upper end of the oil chamber as a reference point, in the axial direction of the rotating shaft member. Additionally, the preset range is set between the outer peripheral face of the casing and relative to the outer peripheral face of the casing as a reference point, in the radial direction of the rotating shaft member.
    Type: Grant
    Filed: February 21, 2018
    Date of Patent: March 24, 2020
    Assignee: DAIDO METAL COMPANY LTD.
    Inventors: Kwangik Na, Motohira Yamada, Shigeyoshi Mori
  • Patent number: 10557495
    Abstract: A connecting rod bearing for a crankpin of a crankshaft of an internal combustion engine includes a pair of half bearings forming a cylindrical shape. Each half bearing has a main cylindrical portion including a circumferentially central portion of the half bearing, and crush reliefs formed on both circumferential sides of the main cylindrical portion with a wall thickness being smaller than that of the main cylindrical portion. At least one half bearing has an axial groove which extends in an axial direction on a slide surface of the main cylindrical portion, and is apart from the circumferentially central portion by a circumferential angle of 10° or more toward a forward side in a rotation direction of the crankpin, and apart from the crush relief by a circumferential angle of 10° or more toward the circumferentially central portion.
    Type: Grant
    Filed: September 26, 2018
    Date of Patent: February 11, 2020
    Assignee: DAIDO METAL COMPANY LTD.
    Inventors: Seiji Amano, Shinichi Sakurai