摘要:
A reciprocating device has a construction, in which a slider is formed by fixing a table member to a bearing casing which is movable inside a track bed having a C-shaped section in a longitudinal direction thereof, and a continuous drive is disposed along the track bed for reciprocating the slider. A weight and sizes of the device can be reduced, and reciprocating motion without a pitching motion can be achieved. Accordingly, the invention can prevent generation of uncomfortable noises during a movement of the slider, and also can prevent reduction of durability of the device which may be caused by irregular wear of a bearing for guiding the slider.
摘要:
A linear actuator unit has a slide plate which is allowed to freely move along the outer rail while causing a cover to retreat. The linear actuator unit includes: an outer rail, which is formed into a cylindrical shape, and includes the slit-opening portion formed along an axial direction thereof; the slide plate (3), which is coupled to an inner block in the hollow portion through the slit-opening portion; a cover belt, which is tensioned between both ends in a longitudinal direction of the outer rail so as to cover the slit-opening portion; a belt-guiding member, which separates the cover belt from the outer rail correspondingly to movement of the slide plate; and a seal member, which seals between the belt-guiding member and the cover belt and between the belt-guiding member and the outer rail.
摘要:
Provided is a rolling guide device which can be produced easily and inexpensively by achieving a reduction in the number of parts constituting a slide member (2) and a reduction in machining worker-hours therefor. The rolling guide device includes: a raceway rail (1); and the slide member (2) assembled to the raceway rail (1) through an intermediation of the large number of balls (3), in which the slide member (2) is formed by bending a metal plate member (4) and has a lateral web (20) and a pair of flange parts (21) to be formed in a channel-like configuration, and in which each of the flange parts (21) has a track groove (30) in which the balls (3) circulate, the track groove (30) including a load straight-line groove (31) allowing the balls (3) to roll while bearing a load, a pair of ball deflection grooves (34) and releasing the balls (3) having rolled through the load straight-line groove (31) from the load while changing their direction, and a non-load straight-line groove (34) transferring the balls (3) from one ball deflection groove (34) to the other ball deflection groove (34).
摘要:
A robot joint structure α is composed of a metacarpal member 30 and a proximal member 40 swingably connected through a hinge 31 to a side end portion of the metacarpal member 30. The proximal member 40 includes a linear guide device 44 for an MP joint having a moving member movable in association with a self swing motion thereof, and by connecting a rod 32a and the moving member through a link mechanism 50, a driving force of an air-cylinder 32 is transmitted to the proximal member 40. On the other hand, a second robot joint structure β is also provided with linear guide devices 48, 66, 74 and link mechanisms 69, 75, to which a driving force of the air-cylinder 62 is transmitted through a drive shaft 63 in association with a rod 62a. A robot finger is constructed by the first and second robot joint structures. According to such structures, smooth joint motion can be realized, and the robot joint structure and the robot finger having improved gripping force can be provided.
摘要:
Provided is a ball screw device capable of downsizing a nut member (2), simplifying a circulation structure for balls (3), in which endless circulation of the balls (3) between the nut member (2) and a screw shaft (1) can be smoothly performed, and fluctuation of a rotation torque which occurs when the screw shaft (1) rotates relative to the nut member (2) can be suppressed as small as possible. A ball circulation groove (21) corresponding to all the periphery of the screw shaft (1) is formed on the inner peripheral surface of the nut member (2). The ball circulation groove (21) includes a load rolling groove (22) opposed to the ball rolling groove (10) in the screw shaft (1) and a ball returning groove (23) connecting one end and another end of the load rolling groove (22) to each other. The ball returning groove (23) is directly formed on the inner peripheral surface of the nut member (2) continuously with the load rolling groove (22) with no boundary, and a sectional shape of the ball returning groove (23), which is perpendicular to a ball advancing direction is formed in a Gothic arch shape so that each of the balls (3) is brought into contact with the ball returning groove (23) at two points.
摘要:
A robot joint structure α is composed of a metacarpal member 30 and a proximal member 40 swingably connected through a hinge 31 to a side end portion of the metacarpal member 30. The proximal member 40 includes a linear guide device 44 for an MP joint having a moving member movable in association with a self swing motion thereof, and by connecting a rod 32a and the moving member through a link mechanism 50, a driving force of an air-cylinder 32 is transmitted to the proximal member 40. On the other hand, a second robot joint structure β is also provided with linear guide devices 48, 66, 74 and link mechanisms 69, 75, to which a driving force of the air-cylinder 62 is transmitted through a drive shaft 63 in association with a rod 62a. A robot finger is constructed by the first and second robot joint structures. According to such structures, smooth joint motion can be realized, and the robot joint structure and the robot finger having improved gripping force can be provided.
摘要:
A rolling-element hold spacer 9 includes a spherical indent 11 which is formed in either side of a rolling element 7 so as to match the curved surface of the rolling element 7; thick hold sections 10a, 10b to be interposed between the rolling elements 7; and thin bent sections 12 for interconnecting only one thick hold section pair 10a, 10b in which the rolling element 7 is to be interposed. The thin bent section 12 is deflected or twisted in a curved portion of a rolling-element circulation path. Further, the rolling-element hold spacers which are adjacent to each other with a single rolling element interposed therebetween mutually perform pivotal movement around the rolling element 7, thereby enabling smooth circulation of the rolling elements 7. Clearance arises between the rolling element 7 and the thick hold sections 10a, 10b as a result of bent of the thin bent section 12. Lubricant enters the clearance, to thereby sufficiently lubricate the rolling elements 7. So long as the rolling-element hold spacer 9 is placed every other the rolling elements 7, all the rolling elements 7 are eventually held by the rolling-element hold spacers 9. Consequently, the number of rolling-element hold spacers 9 can be reduced to one-half the number of the rolling elements 7, and the number of rolling elements 7 can be increased correspondingly.
摘要:
The present invention relates to a method of manufacture of a slider of a rectilinear guide unit for guiding a movable body such as a work table of a machine tool, an industrial robot or the like by moving along an orbital rail arranged on a stationary section such as a bed, column or the like as it bears a load thereon. This method comprises a first step in which a metallic block main body as a core of the slider is machined to a predetermined shape and to form ball load rolling contact surfaces in the block main body and a second step in which the block main body machined in the previous step is inserted into a mold so as to allow a die-molding material to be padded thereon to thereby form an endless ball circulation path wherein in the first step, chamfered sections are formed on the corners of the block main body corresponding to a portion where the above-mentioned endless ball circulation path is formed.
摘要:
An object of this invention is to provide a rolling motion guide apparatus and a method of manufacturing a movable member for the apparatus enabling to enhance a working efficiency by sufficiently minimizing the boundary portion between the molding shaped portion and the movable member body. The apparatus and the method are characterized in that a pipe portion (14) for forming a rolling member return passage is integrally provided to an inner periphery portion of a through bore (13) formed so as to penetrate through a movable block body (6), and a boundary portion between a molding die portion and the movable block body (6) is limited to portions, i.e., a portion between an end surface (61) of the movable block body and a round piece portion (16) and a portion between a ball rolling groove (10) and a ball retaining portion (12).