Daido Metal Company Ltd.

Kotaro Kashiyama

Hideki Iwata

Minoru Ichikawa

Takeshi Shindo

Takahiro Niwa

Takayoshi Sasaki

Tomomitsu Furukawa

Takuya Tanaka

Weixing Zhong

Yukihiro Imaeda

Hajime Kachi

An object of the present invention is to provide a sliding member which can slide for a longer period of time even in a dry state. In the present invention, sliding layersare provided on the surfaces of a base material, and the sliding layercontains polybenzimidazole (PBI) and 1 to 70 vol % of a solid lubricant. Since PBI, which is a thermoplastic resin, has higher heat resistance and also has higher material strength than PAI, PI, and EP, which are the conventionally used thermosetting resins, the wear resistance and the anti-seizure property can be improved and a decrease in material strength caused by high-temperature atmosphere, heat generation at the time of sliding, etc. can be restrained. Furthermore, the initial conformability can be improved because of high elongation percentage. Also, since the sliding layer contains the solid lubricant, the coefficient of friction can be decreased, and hence the anti-seizure property can be enhanced.

Sliding member

There is provided a double-sided sliding thrust bearing of a plate shape adapted to be in sliding contact with a counterpart on each of both faces of the thrust bearing, comprising a bearing structure provided with a plate-shaped base member having an anchor effect on each of both faces thereof, and a sliding layer having a thickness not less than 30 &#x3bc;m on each of the faces of said base member which sliding layer is made of a thermosetting resin-containing material. By making the thickness of the sliding layernot less than 30 &#x3bc;m, it becomes possible for the thrust bearingto slide shoes for a longer time even when being used in a dry state and the sliding layercomes to be hardly peeled off from the base memberbecause of the anchor effect of the base member. Further, the mechanical strength and thermal conductivity of the thrust bearingcan be improved by the base memberlocated between the sliding layers

Double-sided sliding thrust bearing

The invention provides a method of processing an inner surface of a bearing having a cylindrical shape which bearing includes a resin layer composed mainly of a synthetic resin as the inner surface, the method improving roughness of the inner surface and dimensional accuracy of an inner diameter of the bearing without cutting the inner surface. According to the method, the bearing is press-fitted into a jig and then the jig is mounted on a chuck. Next, a mandrel having a cylindrical bar shape is inserted into an inner diameter portion of the bearing and then the mandrel is heated by a heater up to 250&#xb0; C., for example. The mandrel is expanded due to thermal expansion by the heating so that the inner surface, i.e., a surface of the resin layer is pressed by a press face of a peripheral surface of the mandrel.

Method of processing inner surface of bearing

In a hydraulic shock-absorber comprising a cylinder, a piston rod provided with a rebound stopper secured thereto, and a rod guide provided at an end of said cylinder which rod guide butts against the rebound stopper at an extension stroke end of the piston rod, the rod guide is formed of a plate and comprises, at the location of butting against the rebound stopper, a butting planar portion extending radially of the cylinder from a lower end of the inner cylindrical portion against which butting planar portion the rebound stopper butts, and a butting slant portion extending downward obliquely toward the cylinder from an outer end of the butting planar portion against which butting slant portion an radially outer portion of the rebound stopper butts, thereby enabling the rod guide to be prevented from being deformed and also allowing the piston rod to always slide smoothly.

Hydraulic shock-absorber

There is disclosed an ultrasonic cleaning apparatus in which the amount of gas dissolved in a cleaning liquid in a cleaning vessel is reduced, thereby enabling a cleaning operation efficiently. The cleaning liquid stored in the cleaning vessel, cleans articles, immersed therein, by a cavitation phenomenon caused by an ultrasonic vibrator. The cleaning liquid is fed to a degassing vessel by a discharge pump through a discharge pipe, and is returned to the cleaning vessel by a supply pump through a supply pipe. Thus, the cleaning liquid is circulated between the two vessels. Gas, dissolved in the cleaning liquid in the degassing vessel, makes bubbles since the degassing vessel is kept to a vacuum, so that the cleaning liquid containing a reduced amount of dissolved gas is stored in the cleaning vessel. Therefore, bubbles are less produced by the ultrasonic vibrator, and the cleaning operation can be carried out efficiently.

Ultrasonic treatment apparatus

A spherical sliding bearing comprising a hollow inner rotating metallic shaft member having a spherical convex surface on its periphery, an outer load-carrying member having a spherical concave surface generally in conformity with the convex surface, the inner rotating shaft member being supported by the outer load-carrying member so as to freely rotate and oscillate under the sliding-contact relationship between the convex and concave surfaces, and a pressure-bearing seat being interposed between the convex and concave surfaces, which contains a fluorocarbon resin, a modifier dispersed in the fluorocarbon resin and a metallic member which is entirely embedded in the fluorocarbon resin and assures the strength of the pressure-bearing seat.

Spherical sliding bearing

A flow detector according to the present invention is arranged in a fluid piping circuit, or at an inlet or an outlet of the fluid piping circuit and has a fluid inlet and a fluid outlet, and further comprises a piston having a magnetic member as a part thereof and reciprocated by pressure difference of the fluid between the fluid inlet and the fluid outlet, a fixed magnetic member positioned at a predetermined distance from the piston, and a detection sensor arranged in a position where the detection sensor is subject to alternate magnetic action from the magnetic member of the piston when the piston is reciprocated at a predetermined stroke, for detecting a flow of the fluid in response to change in the magnetic action.

Flow detector

A distributor is connected through a main pipe to a discharge port or discharge ports of a lubricating apparatus. Deaerating valves of the distributor are disposed in connection with at least one of a main pipe flow passage and discharge ports of the distributor.

Distributor

A lubricating device for intermittently supplying a lubricating fluid to a plurality of portions to be lubricated comprises a gear pump, a plunger pump, and an electronic control unit for controlling actuation and suspension of the gear pump. The plunger pump includes a flow passage connected to an outlet port of the gear pump, a selector valve unit connected to the flow passage, a piston unit connected to the selector valve unit and an outlet port connected to the piston unit.

Growing community of inventors

Inuyama, Japan

Kotaro Kashiyama