Daido Metal Co.

Inuyama, Japan

Daido Metal Co.

Inuyama, Japan

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There is provided a half thrust bearing (8) having a semicircular-ring shape for a crankshaft of an internal combustion engine, including a back metal layer (84) and a bearing alloy layer (85) having a slide surface (81) on which thrust reliefs (82) are formed adjacently to both circumferential end surfaces (83) so that a wall thickness of the half thrust bearing becomes thinner from the slide surface toward the circumferential end surfaces. A thrust relief length (L1) of each thrust relief extends over a circumferential angle (1) from the circumferential end surface toward a circumferential central portion, and is constant between an inside end portion and an outside end portion in a radial direction of the half thrust bearing. A flat surface of each thrust relief includes a first region (86) on the circumferential end surface side and a second region (87) on the circumferential central portion side.


There is provided a half thrust bearing having a semicircular-ring shape for a crankshaft of an internal combustion engine, including a back metal layer and a bearing alloy layer having a slide surface on which thrust reliefs are formed adjacently to both circumferential end surfaces so that a wall thickness of the half thrust bearing becomes thinner from the slide surface toward the circumferential end surfaces. A thrust relief length L1 of each thrust relief extends over a circumferential angle 1 from the circumferential end surface toward a circumferential central portion, and is constant between an inside end portion and an outside end portion in a radial direction of the half thrust bearing. A flat surface of each thrust relief includes a first region on the circumferential end surface side and a second region on the circumferential central portion side.


Patent
Daido Metal Co. | Date: 2017-05-31

There is provided a bearing apparatus of a crankshaft for an internal combustion engine that can promptly supply oil into a bearing clearance at start and can minimize the amount of oil supply during regular operation. The bearing apparatus (1) of a crankshaft for an internal combustion engine includes a crankshaft having a plurality of journal portions and a plurality of crank pin portions; a main bearing supporting the crankshaft; and a bearing housing holding the main bearing. The plurality of journal portions include a first journal portion (61) having a lubricating oil passage and a second journal portion (62) not having the lubricating oil passage. The first and second journal portions (61) and (62) are supported by the first and second main bearings (41) and (42). The bearing housing (8) includes an A1 alloy upper housing (81) and an Fe alloy lower housing (82). The groove depth (D2) of the oil groove (42G) of the upper half bearing (42U) of the second main bearing (42) is one half or less than the groove depth (D1) of the oil groove (4 1 G) of the upper half bearing (41U) of the first main bearing (41).


Patent
Daido Metal Co. | Date: 2016-11-16

Provided is a sliding member (1) comprising: a steel back metal layer (2); and a sliding layer (3) including a porous sintered layer (4) and a resin composition (5). The porous sintered layer (4) includes Fe or Fe alloy granules (6) and a Ni-P alloy part (7) for binding the granules (6) with one another and/or for binding the granules (6) with the steel back metal layer. The steel back metal layer (2) is made of a carbon steel including 0.05 to 0.3 mass% carbon, and includes: a non-austenite-containing portion (2A) having a structure of a ferrite phase (9) and perlite (10) formed in a central portion in a thickness direction of the steel back metal layer; and an austenite-containing portion (8) having a structure of a ferrite phase, perlite and an austenite phase (11) formed in a surface portion of the back metal layer facing the sliding layer.


Patent
Daido Metal Co. | Date: 2016-05-11

A bearing device includes a bearing member provided with a circumferentially extending sliding surface and a housing holding the bearing member on an inner circumferential surface thereof. The bearing member is provided with a bearing outer peripheral surface on one side thereof facing the housing. The bearing outer peripheral surface is surface roughened (52). The housing is provided with a housing inner peripheral surface on one side thereof facing the bearing member. The housing inner peripheral surface is surface roughened (51). When a mean height Rc of a roughness curve element of either of the bearing outer peripheral surface and the housing inner peripheral surface is Xm, the remaining other of the bearing outer peripheral surface and the housing inner peripheral surface has a material ratio Rmr (Xm) of roughness curve being equal to or less than 10% in at least one measurement direction.


Patent
Daido Metal Co. | Date: 2016-06-30

The present invention provides a half thrust bearing in a semicircular ring shape for receiving an axial force of the crankshaft of the internal combustion engine, that include a back metal layer, a bearing alloy layer and a resin slide layer, or a bearing alloy layer and a resin slide layer. The resin slide layer constitutes a slide surface receiving the axial force, and the half thrust bearing includes thrust reliefs formed on a side receiving the axial force and adjacent to both circumferential end portions thereof so that a wall thickness of the half thrust bearing becomes thinner toward the circumferential end portions. At least the thrust relief on a rear side in a rotational direction of the crankshaft has a thrust relief length which becomes larger toward an outer end portion from an inner end portion in a radial direction of the half thrust bearing.


Patent
Daido Metal Co. | Date: 2016-08-10

A main bearing (4) includes first and second half bearings (41, 42), each having a main cylinder portion and crush relief portions in both circumferential end portions. An oil groove (41a) circumferentially extends on an inner circumferential surface only of the first half bearing, one circumferential end portion of the oil groove opens on a circumferential end surface on a front side in a rotation direction, and the other circumferential end portion of the oil groove is positioned in the crush relief portion on a rear side in the rotation direction. The first half bearing includes a transition region between the crush relief portion on the front side in the rotation direction and the main cylinder portion, and the second half bearing includes a transition region between the crush relief portion on the rear side in the rotation direction and the main cylinder portion.


Patent
Daido Metal Co. | Date: 2016-03-15

According to the present invention, there is provided a slide member for a shock absorber of a vehicle including a back metal, a porous sintered metal layer containing a porous sintered metal formed on the back metal and a resin with which the porous sintered metal is impregnated and covered, and a resin slide layer formed on the porous sintered metal layer and having a smooth slide surface, and the slide member is formed in a cylindrical shape so that the resin slide layer is disposed on an inner peripheral side. The resin slide layer is composed of polytetrafluoroethylene and a plurality of granular elements dispersed in the polytetrafluoroethylene, and the granular element is composed of molybdenum disulfide and molybdenum trioxide, and/or tungsten disulfide and tungsten trioxide.


Patent
Daido Metal Co. | Date: 2016-06-15

Provided is a sliding member (1; 1) having a steel back metal layer (2; 2) and a sliding layer (3). The sliding layer (3) includes a porous sintered layer (4) including Fe or Fe alloy phase (6) particles and a Ni-P alloy phase (7) functioning as a binder. The steel back metal layer (2; 2) is made of a carbon steel including 0.05 to 0.3 mass % carbon and includes a ferrite phase (9) and a pearlite phase (10). A central portion in a thickness direction of the steel back metal layer (2; 2) includes not greater than 30 volume % of the pearlite phase (10). The steel back metal layer (2; 2) includes a high pearlite phase portion (8; 8) in its surface facing the sliding layer (3). The high pearlite phase portion (8; 8) includes not less than 50 volume % of the pearlite phase.


Patent
Daido Metal Co. | Date: 2016-08-10

A main bearing (4) includes first and second half bearings (41, 42), each having a main cylinder portion and crush relief portions in both circumferential end portions. An oil groove (41a) circumferentially extends on an inner circumferential surface only of the first half bearing, one circumferential end portion of the oil groove opens on a circumferential end surface on a front side in a rotation direction, and the other circumferential end portion of the oil groove is positioned in the main cylinder portion. The first half bearing includes a transition region at least between the crush relief portion on the rear side in the rotation direction and the main cylinder portion, and the second half bearing includes a transition region at least between the crush relief portion on the front side in the rotation direction and the main cylinder portion.

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