Patent ID: 7174996
Filing Date: 2007-02-13
Classification: F16H,Y10T

Abstract:
1. A hydraulic fluid feeder, comprising: a revolving shaft provided with at least one piece of hydraulic equipment operated by switching oil pressure on the revolving shaft; a central hole provided within the revolving shaft and along a centerline of the revolving shaft; a first hollow tube having a smaller outside diameter than an inside diameter of the central hole is concentrically inserted into the central hole; a second hollow tube having a smaller outside diameter than an inside diameter of the first shaft is concentrically inserted into the central hole, the first and the second hollow tubes forming a double tube partitioning the central hole into three passages, and at least a first one of the passages being a hydraulic fluid supply passage for the at least one piece of hydraulic equipment and at least a second one of the passages being a lubricating oil supply passage for a bearing supporting the revolving shaft; a casing having a fluid passage connecting part, the casing covering said revolving shaft and the first and second hollow tubes, the fluid passage connecting part providing a fluid reservoir with a front opening which is exposed to an outside wall of the casing, the casing also having a first hole arranged at an inside of the fluid reservoir; a hydraulic passage; a partitioning member within the casing for partitioning the fluid reservoir into a first fluid reservoir and a second fluid reservoir, said partitioning member further including an insertion hole in a center of said partitioning member; a lid fixed to the front opening of the fluid passage connecting part of the casing, thereby being operatively connected to the casing by a screw; a first fitting part provided between the fluid passage connecting part and the first hollow tube; and a second fitting part provided between the partitioning member and the second hollow tube, wherein the first hydraulic fluid supply passage is formed in the fluid passage connecting part and is connected to the first fluid reservoir, and the second hydraulic fluid supply passage is formed in the fluid passage connecting part and is connected to the second fluid reservoir, wherein the first hollow tube is operatively connected to the first fluid reservoir via the first hole, thereby opening the first hollow tube to the first fluid reservoir, and the second hollow tube is operatively connected to the second fluid reservoir via the insertion hole of the partitioning member, thereby opening the second hollow tube to the second fluid reservoir, wherein the lid does not make contact with any of the first hollow tube, the second hollow tube, or the partitioning member, and wherein the first and second fitting parts prevent revolution of the first and second hollow tubes.