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8146453 |
Motion guide device
A motion guide device is provided which comprises a chain of rollers in which retainers are interposed, in which the chain of rollers is given a degree of freedom of rotation. The motion guide...
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8132478 |
Motion guide apparatus
A motion guide device includes a ball nut attached onto a shaft and having helical grooves for receiving ball bearing elements, and a ball coupler including a flexible coupling member having a...
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8132477 |
Ball screw device
A ball screw device having a novel ball circulation structure suitable for a screw shaft with a large lead, optimum for downsizing and weight saving of a nut member, capable of being manufactured...
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8109169 |
Ball screw device
A ball screw device 10 capable of increasing a load capacity by increasing the size of ball diameter and the number of threads by preventing the cutout of a nut from being interfered with a thread...
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8051736 |
Deflecting device for ball screw device
A ball screw device includes a screw engaged into a nut member for forming an endless ball guiding passage between the nut member and the screw and for receiving a number of ball bearing members,...
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8033195 |
Low-noise screw device
Provided is a screw device capable of reducing noise generated therefrom. The screw device has a screw shaft 5 having a rolling-element rolling groove 5a spirally formed on an outer peripheral...
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7992461 |
Circulating device for motion guide apparatus
A motion guide device includes a ball nut attached onto a shaft and having helical grooves for receiving ball bearing elements, a tubular member is engaged with the ball nut and includes a ball...
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7946018 |
Assembly apparatus for ball screw device, parts supply device and counter device
An assembly apparatus for assembling a ball screw device includes a support block, a nut arranged in a longitudinal direction, a nut reception base that arranges the nut so that its axial direction...
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7934438 |
Ball screw device having circulating device background of the invention
A ball screw device includes a screw shaft rotatably engaged with a ball nut, and a number of bearing members received between the ball nut and the screw shaft, and a circulating device for...
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7870806 |
Ball screw device
The invention relates to a ball screw device in which a screw shaft and a nut member are threadedly engaged with each other through a number of balls. In such a ball screw device, an inner surface...
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7845251 |
Roller screw having plural circulating devices cooperating with plural helical grooves
A roller screw having plural circulating devices cooperating with plural helical grooves comprises a screw, a nut, plural rollers and circulating devices. The screw is provided in a surface with at...
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7832300 |
Roller screw
There is provided a roller screw comprising a screw shaft 1 having an outer peripheral surface in which a spiral roller rolling groove 1a is formed, a nut member 2 having an inner peripheral...
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7810406 |
Circulating assembly for a ball screw
A circulating assembly for a ball screw comprises a cassette and a separator. The fitting hole of the cassette facilitates the installation of the balls, and the separator is inserted in the...
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7677126 |
Ball screw mechanism
A ball screw mechanism including a screw having a first axis and at least one screw groove extending along a first helical path about the first axis, and a nut having a first aperture receiving the...
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7640820 |
Ball screw assembly and spacer elements therefor
A ball screw assembly has an axially extending screw with an external helical groove and a nut with a through bore for receipt of the screw. The through bore has an internal helical groove adapted...
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7640821 |
Circulating member for a ball screw
A circulating member for a ball screw is disposed on a nut, the nut is formed with Gothic type threads, and the circulating member of the ball screw is formed with return path for enabling the...
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7628090 |
Circulation passage structure for a ball screw
A circulation passage structure for a ball screw, the circulation passage structure is used to connect the helical groove and the circulation hole of the nut, so as to form a circulation path for a...
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7578214 |
Preload structure for a ball screw
A preload structure for a ball screw in the inner surface of a nut is formed a helical groove whose lead is different from the lead of the adjacent helical groove to produce a lead deviation...
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7536929 |
Ball screw and method for producing a spindle nut, in particular of a ball screw
Method for producing a spindle nut of a ball screw, by provided the circumference of the nut with at least one through-opening for receiving a deflecting piece for balls of the ball screw. A hole...
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7523682 |
Ball screw device having a ball guide member
A ball screw device includes a screw shaft threaded with a ball nut which has two channels and an opening, a guide member is engaged into the opening of the ball nut and has two curved pathways...
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7523681 |
Ball screw device having deflecting member background of the invention
A ball screw device includes a ball nut having an inner thread formed by a number of helical groove portions and helical ridges, and an opening and a depression communicating with each other, and a...
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7520193 |
Ball screw assembly
A ball screw assembly, wherein the circulate component is positioned in the nut by inserting a protrusion in a notch, so that the circulate component is positioned easily, and the problem of...
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7516681 |
External circulation type ball screw
An external circulation type ball screw comprises a screw, a nut, rolling elements and a return member. The nut is a hollow structure mounted on the screw. The rolling elements are received in the...
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7487692 |
Guiding device for ball nut
A ball nut includes a nut member having an inner thread formed in a bore for threading with a screw member, the nut member includes a recess and an opening communicating with the bore of the nut...
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7390241 |
Linear motion apparatus and method for manufacturing thereof
A linear motion apparatus has a guide shaft including a spiral-shaped or linear-shaped rolling element rolling groove, a movable body including a spiral-shaped or linear-shaped rolling element...
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7363835 |
Ball screw apparatus
A ball screw apparatus includes: a screw shaft having a screw groove, a nut having a screw groove and holes, a number of balls rollably provided between the screw grooves, and a ball circulating...
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7350434 |
Ball screw device
The invention relates to a ball screw device in which a screw shaft and a nut member are threadedly engaged with each other through a number of balls. In such a ball screw device, an inner surface...
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7305902 |
Ball screw device
A ball screw device comprises a screw shaft, a nut externally mounted on the screw shaft, and a multiplicity of balls interposed between thread grooves of the screw shaft and the nut. The screw...
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7210369 |
Ball screw drive
In a ball screw drive comprising a spindle nut (2) that can be disposed on a spindle (1), said spindle nut (2) comprising on an inner periphery, a ball groove (3) that is arranged along a helix and...
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7207234 |
Ball screw
In a ball screw, a nut is fitted with the outer periphery of a screw shaft, ball rolling grooves opposed to each other are formed in the screw shaft and the nut The ball rolling grooves cooperate...
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7185553 |
Screw feed apparatus
A screw feed apparatus has a screw shaft having a screw groove formed on the outer peripheral surface thereof; a nut having a screw groove formed on the inner peripheral surface thereof opposed to...
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7080571 |
Ball screw
A ball screw has a screw shaft including a spiral-shaped ball rolling groove formed in an outer peripheral surface thereof; a nut including a spiral-shaped ball rolling groove formed in an inner...
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7040189 |
Circulation member of ball screw and ball screw using same
A circulation member of a ball screw for circulating a ball rolling on a spiral ball rolling groove formed on a screw shaft. The circulation member includes a central portion and a pair of leg...
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7017437 |
Ball screw
In a ball screw drive comprising a spindle (1), a nut (3) surrounding the spindle (1), and balls (4) arranged between the spindle (1) and the nut (3), which balls (4) are in rolling contact with a...
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6993992 |
Ball screw
A ball screw which is little subject to deterioration of operating characteristics and occurrence of wear, torque change, noise, vibration, etc. during operation due to stagnation or competition of...
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6955468 |
Linear-motion device and ball screw
A linear-motion device has: a linear-motion element fitted on a shaft which moves straight along the shaft; a plurality of balls which are retained in a ball groove formed on the inner side of the...
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6938510 |
Ball screw apparatus
A ball screw apparatus, has a screw shaft including a screw groove; a nut fitted with the screw shaft, the nut including a screw groove and a ball return passage; a circulation piece including a...
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6874939 |
Circulation member, motion guide device provided with circulation member and ball screw provided with circulation member
A ball screw comprises a screw shaft, a nut assembled with the screw shaft, a number of balls disposed in the ball rolling passage formed by a ball rolling groove formed to the screw shaft and a...
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6851722 |
Coupled circulation tube for ball screw unit
A coupled circulation tube for a ball screw unit. The tube is formed on a planar surface at one side of the ball screw bearing, each tube joined to two circulation holes. Each circulation tube is...
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6813969 |
Rocker return liner for ball nut
A ball nut and return liner assembly includes a ball nut having a tubular body having a longitudinal axis, the tubular body having an inner surface and an outer surface, a plurality of arcuate...
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6813970 |
Ball-nut assembly and method for making
A ball-nut assembly includes a ball nut and a crossover member. The ball nut incudes a radial through slot and an outer surface. The outer surface has a first portion, has a ledge radially recessed...
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6681651 |
Ball screw
There is provided a return pipe type ball screw capable of accurately positioning and fixing return pipes on and to a nut member even when a troublesome positioning operation is not carried out,...
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6397697 |
Ball screw
In a ball screw according to the present invention, four circulation passages forming a circulation route are respectively arranged in the axial direction of the ball screw. The mounting positions...
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6286383 |
Ball screw device
This invention relates to improvement of a ball screw unit in which a nut member meshes with a screw shaft via a plurality of balls circulating endlessly. The balls are disposed freely rotatably in...
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6112610 |
Externally insertable self-retaining crossover for ball nut and screw assemblies
A ball nut and screw system provides a helical raceway for load bearing balls disposed to occupy portions of the turns of the helical groove in the nut. The nut has a passage extending generally...
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6092434 |
Ball screw device of ball-circulating-part embedded type
A ball screw device of a ball-circulating-part embedded type includes: a screw shaft having a helical thread groove on an outer peripheral surface thereof; a ball nut having a thread groove...
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5937700 |
Externally installable ball return crossover systems for ball nut and screw assemblies and methods of constructing and installing them
A ball nut and screw system has a ball nut with adjacent helical groove turns providing a helical raceway with a screw for load bearing balls received in the raceway. The nut has an opening...
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5622082 |
Ball nut and screw assemblies with improved crossovers
A crossover button, in combination with a ball nut and screw assembly, has a generally Z-shaped body with a section received within a radial bore in the nut. The body has an axially diagonal,...
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5586469 |
Out-of-circuit ball preventing structure for ball screw nut
In an out-of-circuit ball preventing structure for a ball screw nut having a plurality of ball circulation circuits over an inner circumferential surface thereof, an oblique diameter of an...
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5560251 |
Ball nut and screw assembly with an improved ball nut connector system and method of securing the ball nut of the assembly in operating position
The ball nut and screw assembly includes a ball nut with a radially projecting tang which is received in an aperture in a connector collar for the ball nut. The tang has an axially extending slot...
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