摘要:
A linear actuator capable of realizing low dusting and low noise and having a large bearable load in axial direction, wherein a plurality of spacers 30...having spherical recessed parts corresponding to the curved surfaces of balls 28... at both ends thereof are installed between the balls 28...at a guide part and connected in series to a flexible band-like member 31, and a plurality of spacers 35 having spherical recessed parts corresponding to the curved surfaces of balls at both ends thereof and separated from each other are installed between the balls 33 for the screw shaft of a screw part, whereby, since a retainer 27 and the spacers 35 are selected according to the shapes of the guide part and the screw part, an unnecessary contact can be prevented from occurring between the balls and between the balls and a circulation passage around the balls to realize the low dusting and low noise.
摘要:
A tape-shaped molding and a belt for ball chain. A synthetic resin tape-shaped molding comprising a thermoplastic synthetic resin tape-shaped material having a fibrous material contained in its longitudinal edge portions or in the vicinity thereof. A fibrous material contained in a synthetic resin tape-shaped molding produced by injection molding of a resin of the same kind as that of the fibrous material with the use of a fibrous material as an insert, which fibrous material is positioned in longitudinal edge portions of the synthetic resin tape-shaped molding or in the vicinity thereof. A belt for ball chain comprising ball fitting holes provided in an equal-interval linear arrangement and ball securing protrusions provided around each of the holes.
摘要:
In a bearing for vertical axis windmill configured to rotatably support a vertical axis of a vertical axis windmill, the bearing includes a ball (7), a diameter of the ball and a curvature of a rolling groove of the bearing are set to satisfy a predetermined starting torque and a load rating. For example, the curvature of the rolling groove of the bearing is 54% or more and 100% or less, and the diameter of the ball has a ratio of 20% or less with respect to a vertical shaft (2).
摘要:
A steering controller of vehicle having a novel mechanism employing a ball screw mechanism in which the size can be reduced furthermore. The steering controller of vehicle comprises a first input shaft (1) being coupled with a handle, a second input shaft (2) being coupled with a motor, an output shaft (3) being coupled with a steering wheel, a first transmitting means (6) for rotating a nut (5) through rotary motion of the first input shaft (1) so that rotary motion of the first input shaft (1) is transmitted to the output shaft (3), and a second transmitting means (7) for moving the nut (5) linearly in the axial direction with respect to the output shaft (3) through rotary motion of the second input shaft (2) so that rotary motion of the second input shaft (2) is transmitted to that of the output shaft (3). Center lines of the second input shaft and the output shaft (3) are substantially aligned.
摘要:
The present invention provides a screw device enabling insulation of sounds occurring from the inside of the screw device when circulating rolling elements. The screw device includes: a screw shaft 1 having a spiral rolling-element rolling groove 1a on an outer circumferential surface; a nut body 2 having a spiral loaded rolling-element rolling groove 2a on an inner circumferential surface to oppose the rolling-element rolling groove 1a of the screw shaft 1 and having therein a rolling-element returning passage 6 to return rolling elements 3 rolling in a loaded rolling-element rolling passage 10 formed between the loaded rolling-element rolling groove 2a and the rolling-element rolling groove 1a of the screw shaft 1; a circulation member 9 attached to an end face of the nut body 2 and provided with a direction changing passage 5 to connect the loaded rolling-element rolling passage 10 and the rolling-element returning passage 6; and a sound insulating member 11 attached to the nut body 2 to which the circulation member 9 is attached and formed to have an inner circumferential surface coming into contact with the screw shaft and to cover the circulation member 9.
摘要:
A screw device emitting less noise. The screw device has a screw shaft (5) having formed in its outer peripheral surface a spiral rolling-body rolling groove (5a); a nut (6) having formed in its inner peripheral surface a spiral loading-rolling-body rolling groove (6a) facing the rolling-body rolling groove (5a) and having a rolling- body return path for connecting one end and the other end of the rolling groove (6a); and rolling bodies (7) arranged in a rolling body circulation route. A flange (9) is placed at an end in the axial direction of the nut (6), and a low-noise plate (12) is attached to the flange (9) to cover at least a part of an end face of the flange (9).
摘要:
A return pipe is constituted by assembling a pair of return pipe halves split along a non-load passage. A pipe hold down member is fixed to a nut member so as to straddle the return pipe, fixing the return pipe to the nut member. A flange is formed on each of the return pipe half bodies, while a pair of fixing leg portions covering the flange of each return pipe half is formed on the pipe hold down member. Fastening members penetrate through the fixing leg portions of the pipe hold down member and the flanges of the return pipe halves and are fastened to the nut member. When the fixing leg portions are fixed to the nut member by the fastening members, an engagement portion of the pipe hold down member tightens the pair of the return pipe halves in the direction where split faces of the halves are butted against each other.
摘要:
A method of manufacturing a linear guide device and a track rail for the linear guide device capable of eliminating the need of finishing for securing the parallelism of the rolling surfaces for rolling elements when the plurality of rail members on which the rolling surfaces for the rolling elements are formed are fixed to a rail housing, maximizing the production efficiency of the track rail, and reducing production cost. The track rail comprises the pair of rail members on which the rolling surfaces for the rolling elements are formed and the rail housing having a pair of rail mounting grooves to which the rail members are fitted. The rail members are fixed to the insides of the rail mounting grooves through an adhesive agent. A reference projection in contact with the rail member is formed at the bottom part of one rail mounting groove without disposing the adhesive agent therebetween, and the rail member fitted to the rail mounting groove is fixedly adhered to the rail mounting groove in an abutted state on the reference projection. Also, the rail member fitted to the other rail mounting groove is fixedly adhered to the rail mounting groove at a position apart a specified distance from the reference projection.