Teijin Seiki Co., Ltd.

T. D. Engineering Co., Ltd.

Teijin Seiki Company Limitejd

Kiyozumi Fukui

Toshio Kamimura

Masami Okamoto

A positive displacement pump is provided which is high both in reliability and in durability being durable in a continuous operation for a long period of time with the suction side of the pump temperature-controlled. In the positive displacement pump, rotors (21, 22) are accommodated in a pump housing (10) to form a plurality of operating chambers (31, 32), in such a manner that the operating chambers (31, 32) are increased on the suction side and decreased on the discharge side. A temperature control system (40) for controlling the temperature (12) of the suction inlet (12) of the pump is provided.

Positive displacement pump

A motion transforming mechanism comprises a plate assembly constituted by rotation plates having a common rotation axis, a toothed rail having a parallel rail portion and a mid-longitudinal plane perpendicularly intersected by the common rotation axis and held in mesh with the rotation plates, a housing for housing the plate assembly and the toothed rail, and a rotation shaft supported by the housing and formed with cranked shaft portions respectively received in the rotation plates. The motion transforming mechanism further comprises distance regulating means for regulating the distance between the common rotation axis and the toothed rail. The toothed rail is formed with a toothed portion having a pitch plane perpendicularly intersected by the mid-longitudinal plane and a base portion integrally formed with the toothed portion and having a parallel rail portion in parallel with the mid-longitudinal plane and the pitch plane of the toothed rail.

System for producing guide rail

An electrically-driven thrust generator is provided, which can contribute energy saving, and has properties (thrust controllability, swift action etc.) equivalent to hydraulic cylinders and contributes to solve problems (leakage etc.) associated with oil pipings. The electrically-driven thrust generator comprises a motor 3, a variable reduction ratio speed reducers 5, a rotary motion to linear motion converting mechanism 7, a thrust rod 121 linearly driven by this rotary motion to linear motion converting mechanism 7. The present invention is characterized in that the rotary motion to linear motion converting mechanism 7 comprises an oscillating crank plate driven rack mechanism, which provides a compact and powerful electrically-driven thrust generator equivalent to hydraulic thrust generator.

Electrically-driven thrust generator

Motion transforming mechanism and system for producing same

An actuator for transducing a rotational movement into a linear movement, which comprises:

Actuator

A geared motor comprising: an output shaft rotatably received in a housing; a sun gear securely supported on the output shaft in the housing and having a plurality of external teeth; a ring gear housed in the housing and having a plurality of internal teeth meshed with the external teeth of the sun gear, and the internal teeth of the ring gear having a pitch circle larger than that of the external teeth of the sun gear and being larger in number than the external teeth of the sun gear; supporting means for supporting the ring gear in such manner that the center axis of the ring gear is eccentrically revolvable with respect to the axis of rotation of the output shaft and the ring gear is prevented from being rotated about its center axis; and drive means for generating electromagnetic forces one group of which has a plurality of force directions radially inwardly directed and the other group of which has a plurality of force directions radially outwardly directed, the different groups being circumferentially successively displaceable and driving the ring gear to radially inwardly and outwardly move so that the output shaft is driven to rotate about its axis of rotation.

Geared motor

A speed change device comprises first and second outer gears, crankpins connected to the second outer gear, and pinions having pin holes for receiving the crankpins and outer gear teeth formed at the periphery thereof. The speed change device is characterized in that the pinion has through holes formed in a star shape, and a support block has a star shape corresponding to the shape of the through holes in the pinion, so that the support block is inserted into the through holes in order to support the crankpins by means of pairs of bearings.

Speed change device

A drive controlling mechanism comprises an operative block assembly securely connected with a motor housing accommodating therein a hydraulic motor and rotatably receiving a rotatary shaft of the hydraulic motor; a parking brake arrangement connected with the operative block assembly to brake and release a rotary shaft; a control valve arrangement provided to control of the hydraulic motor and actuation of the parking brake arrangement; a pair of inlet-outlet passages connecting the actuation ports of the hydraulic motor and the control valve arrangement; a control conduit arrangement having a shuttle valve permiting fluid under pressure to be introduced into the parking brake arrangement from the control valve arrangement and to be discharged from the parking brake arrangement; and a drain passage arrangement for discharging fluid under pressure from the parking brake arrangement through the shuttle valve to a drain chamber defined between the motor housing and the hydraulic motor.

Drive controlling mechanism

A drive controlling mechanism comprises an operative block assembly securely connected with a motor housing accommodating therein a hydraulic motor and rotatably receiving a rotary shaft of the hydraulic motor; a parking brake arrangement connected with the operative block assembly to brake and release a rotary shaft; a control valve arrangement provided to control of the hydraulic motor and actuation of the parking brake arrangement; a pair of inlet-outlet passages connecting the actuation ports of the hydraulic motor and the control valve arrangement; a control conduit arrangement having a shuttle valve permitting fluid under pressure to be introduced into the parking brake arrangement from the control valve arrangement and to be discharged from the parking brake arrangement; and a drain passage arrangement for discharging fluid under pressure from the parking brake arrangement through the shuttle valve to a drain chamber defined between the motor housing and the hydraulic motor.

A crawler type travelling vehicle comprises in combination: an endless belt including a number of segments flexibly connected with each other to crawl on the earth; a sprocket wheel drivably engageable with the endless belt and having an axial wheel bore extending axially thereof; a motor housing inserted in said axial wheel bore to rotatably support the sprocket wheel through two bearings with the mid-circumferential plane of the sprocket wheel positioned between the mid-circumferential planes of the bearings; a fixed frame positioned axially inwardly of the sprocket wheel to securely support the motor housing and having an axial frame bore in axial alignment with the axial wheel bore; a hydraulic motor accommodated in the motor housing and having a rotary shaft; a reduction gear unit positioned axially outwardly of the sprocket wheel and within the width of the endless belt to operably be connected with one end portion of the rotary shaft in driving engagement with the sprocket wheel; a control block disposed within the width of the endless belt and securely connected with the axially inner face of the motor housing to rotatably receive the other end portion of the rotary shaft; and a pair of inlet-outlet passages in fluid communication with the hydraulic motor to allow fluid under pressure to pass therein for imparting rotation of the hydraulic motor.

A sealing mechanism, comprises: a first member having a conical bore formed in coaxial relation with its own axis and a first face formed at the side thereof; a second member made of a metal and relatively rotatable with respect to the first member, the second member having a second face spaced from and opposing to the first face of the first member, and an annular groove recessed away from and opposing to the conical bore to have a bottom face and radially inner and outer faces connecting the bottom face and the second face; an annular floating seal assembly accommodated in the conical bore of the first member, the annular floating seal assembly including a metal seal ring having a lip portion extending radially outwardly and toward the annular groove, and a resilient annular ring disposed between the conical bore and the seal ring to urge the seal ring toward the annular groove; and a ring member made of a metal and provided in the annular groove to have a rear face in metal-to-metal contact with the bottom face of the annular groove and a fore face in sliding contact with the lip portion of the ring member to complete sealing between the first and second members during relative rotation of the first and second member.

Sealing mechanism

A driving mechanism comprises an input sun gear meshing with planet gears; and an output shaft of a motor detachably inserted into said input sun gear to enable said input sun gear to be radially movable to a very small degree, whereby said planet gears are allowed to effect a very small eccentric revolutional motion when the torque of said output shaft is transmitted to said input sun gear.

Driving mechanism

A drive controlling mechanism comprises in combination: a hydraulic motor including a cylinder block, and a rotary shaft extending axially of and positioned within the cylinder block to be engaged with the cylinder block for rotation therewith; a motor housing for accommodating therein the hydraulic motor; a control block securely connected with the motor housing and rotatably receiving one end portion of the rotary shaft; a parking brake arrangement detachably received within the axially outer half of the control block for being capable of braking the rotary shaft; a control valve arrangement detachably mounted on the outer peripheral wall of the control block in fluidal communication with the parking brake arrangement by way of a shuttle valve accommodated in a radial bore formed in the control block so that the hydraulic motor is controlled to be driven by the control valve arrangement; and a pair of inlet-outlet conduits for introducing a pressure oil to the control valve arrangement and discharging the pressure oil from the control valve arrangement.

Growing community of inventors

Gifu, Japan

Kiyozumi Fukui