PLANETARY ROLLER SCREW TYPE LINEAR MOTION MECHANISM AND ELECTRICALLY-DRIVEN BRAKE CONTROL SYSTEM

• Main Author: EGUCHI MASAAKI
• Format: Patent
• Language: English; Japanese
• Published: 14.09.2017
• Subjects: ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; BEARINGS; BLASTING; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DYNAMO-ELECTRIC MACHINES; ELECTRICITY; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE SHAFTS; GEARING; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; GENERATION; HEATING; LIGHTING; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OFVEHICLES; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; THERMAL INSULATION IN GENERAL; TRANSPORTING; VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES; VEHICLES IN GENERAL; WEAPONS

PROBLEM TO BE SOLVED: To reduce the number of component elements of a linear motion mechanism to simplify their assembly works and make a compact axial length.SOLUTION: Both ends of a roller shaft 47 for supporting several planetary rollers 49 between an outer diameter surface of a rotating shaft 34 and an inner diameter surface of an outer ring member 21 are supported between a pair of opposing disks 41a, 41b of a rotatably supported carrier 40 by roller shaft supporting parts 46a, 46b formed at a disk. Planetary rollers are auto-rotated and revolved through frictional contact with the rotating shaft by rotation of the rotating shaft, and the outer ring member is linearly moved in an axial direction through engagement between a peripheral groove 54 formed at the outer diameter surface of the planetary roller 49 and a spiral protrusion 53 arranged at the inner diameter surface of the outer ring member. A roller shaft supporting part 46a formed at a disc 41a placed at inner side of the carrier is defined as a non-opened taper hole. A raceway surface 60 is formed at an inner side surface of the inner disc, and a thrust bearing 56 is assembled between the opposing parts between the raceway surface and the shaft supporting member 35 to support the carrier in rotatable manner.SELECTED DRAWING: Figure 2 【課題】直動機構の部品点数を低減して組立ての容易化と軸方向長さのコンパクト化を図る。【解決手段】回転自在に支持されたキャリア４０の対向一対のディスク４１ａ、４１ｂ間において、回転軸３４の外径面と外輪部材２１の内径面間の複数の遊星ローラ４９を支持するローラ軸４７の両端部を、ディスクに形成されたローラ軸支持部４６ａ、４６ｂで支持する。回転軸の回転により、回転軸との摩擦接触により遊星ローラを自転および公転させ、遊星ローラ４９の外径面に形成された円周溝５４と外輪部材の内径面に設けられた螺旋突条５３の噛合によって外輪部材を軸方向に直線移動させる。キャリアのインナ側のディスク４１ａに形成されたローラ軸支持部４６ａを不貫通状のテーパ孔とする。インナ側のディスクのインナ側の側面に軌道面６０を形成し、軌道面と軸支持部材３５の対向部間にスラスト軸受５６を組み込んでキャリアを回転自在に支持する。【選択図】図２