Abstract: A ball screw device includes a ball nut having a bore for receiving a screw shaft, and having a number of longitudinal channels and compartments for forming a zigzag shaped fluid flowing passage in the ball nut, a number of deflecting members engaged with the compartments of the ball nut and each having a recess for communicating adjacent channels with each other, the outer peripheral surfaces of the deflecting members are tilted relative to the ball nut for allowing the deflecting members to be expanded when the deflecting members are expanded, a cooling agent flows through the zigzag shaped fluid flowing passage for cooling the ball nut and for preventing the ball nut from being overheated.

Abstract: A nut rotary ball screw with a predetermined pressure structure is disclosed. In the nut rotary ball screw of the present invention, we may rotate the predetermined pressure adjusting device to adjust the magnitude of the predetermined pressure by generating a predetermined pressure between the first inner slot and the outer slot as well as the first rolling pieces and between the second inner slot and the outer slot as well as the first rolling pieces. The present invention can greatly simplify the complicated adjustment process of the predetermined pressure in the prior art and can eliminate the time-consuming grinding step and the steps to disassemble or assemble a bolt. Accordingly, the present may simplify the adjustment process of the predetermined pressure and may lower the production cost.

Abstract: A ball screw device includes a ball nut rotatably engaged onto a screw shaft for forming a gap between the ball nut and the screw shaft and for receiving a lubricating oil and for forming a helical raceway between the ball nut and the screw shaft, a number of bearing members engaged between the ball nut and the screw shaft and in the helical raceway, and a forcing device includes a barrel having an outer helical member for forming a helical channel and for receiving the lubricating oil, and for forcing the lubricating oil to flow into the gap between the ball nut and the screw shaft and to effectively lubricate the bearing members when the barrel is rotated relative to the screw shaft.

Abstract: A ball screw device includes a ball nut having a bore for receiving a screw shaft, and having a number of longitudinal channels and compartments for forming a zigzag shaped fluid flowing passage in the ball nut, a number of deflecting members engaged with the compartments of the ball nut and each having a recess for communicating adjacent channels with each other, the outer peripheral surfaces of the deflecting members are tilted relative to the ball nut for allowing the deflecting members to be expanded when the deflecting members are expanded, a cooling agent flows through the zigzag shaped fluid flowing passage for cooling the ball nut and for preventing the ball nut from being overheated.

Abstract: 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 fitting hole of the cassette, and the sub-return path in the front end of the separator cooperates with the main return path of the cassette to smoothly guide the circulation of the balls, so that the balls can be installed easily and quickly. And the helical groove of the screw doesn't need to extend to the shoulder portion thereof.

Abstract: The rotating nut ball screw unit with lubricating arrangement has a lubricating device composed of a main body, a collar and a bearing. The main body is provided with several oil holes and is attached to the end surface of the nut. The main body is relatively rotatable with respect to the collar intercalating the bearing therebetween. An oil storage forces the lubricant into an oil reserving space surrounded by the main body, the collar and the bearing. The oil reserving space is in communication with the oil holes and allows the lubricant to be forced into the main body and then to reach the surface of the screw bolt via oil holes. The forced lubrication arrangement of the present invention ensures a better lubricating effect.

Abstract: A ball screw device includes a ball nut rotatably engaged onto a screw shaft for forming a gap between the ball nut and the screw shaft and for receiving a lubricating oil and for forming a helical raceway between the ball nut and the screw shaft, a number of bearing members engaged between the ball nut and the screw shaft and in the helical raceway, and a forcing device includes a barrel having an outer helical member for forming a helical channel and for receiving the lubricating oil, and for forcing the lubricating oil to flow into the gap between the ball nut and the screw shaft and to effectively lubricate the bearing members when the barrel is rotated relative to the screw shaft.

Abstract: A ball screw assembly includes a helical groove formed in the outer surface of the screw shaft without extending to both ends thereof, and an escape portion formed in the form of a slot is connected to one end of the helical groove of the screw shaft. The escape portion allows the cassette to abut against an outer periphery of the screw shaft, and the tongue portion is inserted deeply in the escape portion, such that the cassette is allowed to be rotated to effect axial movement relative to the screw shaft, thus finishing assembly of the nut, and the balls can be prevented from dropping out of the ball screw when the nut is disengaged from the screw shaft or when the nut moves out of travel.

Abstract: A fixed torque preload piece is positioned between two nuts of a ball screw, the preload piece is formed with through hole located in an axial direction of the two nuts for receiving at least two steel balls. Two terminal openings of each of the through holes are defined in the surfaces of the preload piece facing the two opposite nuts. Three radial threaded holes are formed in the outer periphery of the preload piece, and the threaded holes are vertical to and in communication with the through holes. An adjusting member, an elastic member and an adjusting screw are received sequentially in the respective threaded holes. The steel balls in the through holes are pushed against the two nuts by the arc-shaped abutting surface of the adjusting member, the pushing of the steel balls can produce an adjustable preload, and can absorb the sudden increase of the pressure effectively, thus obtaining the objective of the present invention of outputting torque stably.

Abstract: The rotating nut ball screw unit with lubricating arrangement has a lubricating device composed of a main body, a collar and a bearing. The main body is provided with several oil holes and is attached to the end surface of the nut. The main body is relatively rotatable with respect to the collar intercalating the bearing therebetween. An oil storage forces the lubricant into an oil reserving space surrounded by the main body, the collar and the bearing. The oil reserving space is in communication with the oil holes and allows the lubricant to be forced into the main body and then to reach the surface of the screw bolt via oil holes. The forced lubrication arrangement of the present invention ensures a better lubricating effect.

Abstract: 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 assembly difficulty is solved. The method of fixing the circulate components in the nut is that: the circulate component is formed with an axial hole and the radial hole that are connected to each other, the axial hole of the circulate component is aligned to the axial locking hole of the nut, and then liquid resin is injected into the axial hole of the circulate components, and the liquid resin will form a locking members after curing, thus fixing the circulate component in the nut. Due to the formation of the locking member is determined by the diameter of the hole to be machined, the configuration of locking member will be varied in response to the diameter of the hole to be machined. Whatever the diameter of the hole to be machined changes or not, it will not affect the interchangeability of the locking member.

Abstract: 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 fitting hole of the cassette, and the sub-return path in the front end of the separator cooperates with the main return path of the cassette to smoothly guide the circulation of the balls, so that the balls can be installed easily and quickly. And the helical groove of the screw doesn't need to extend to the shoulder portion thereof.

Abstract: A ball screw with an engaging type circulation cassette comprises a nut, a screw shaft and a circulation cassette. The nut and the circulation cassette are defined with a locking groove and a protruding block respectively, and an elastic connecting portion is defined on the circulation cassette for connecting with the engaging groove or the engaging block. Thereby this invention solves the conventional problem of fixing the circulation cassette to the nut only by using the locking element, and the elastic connecting portion of the circulation cassette can increase the convenience for assembling. Furthermore, the circulation path of the circulation cassette is of close type, which can prevent the ball from impacting the nut, so as to reduce the generation of noise.

Abstract: A ball screw assembly, wherein a helical groove is formed in the outer surface of the screw shaft without extending to both ends thereof, and an escape portion formed in the form of a slot is connected to one end of the helical groove of the screw shaft. The escape portion allows the cassette to abut against an outer periphery of the screw shaft, and the tongue portion is inserted deeply in the escape portion, such that the cassette is allowed to be rotated to effect axial movement relative to the screw shaft, thus finishing assembly of the nut, and the balls can be prevented from dropping out of the ball screw when the nut is disengaged from the screw shaft or when the nut moves out of travel.

Abstract: A fixed torque preload piece is positioned between two nuts of a ball screw, the preload piece is formed with through hole located in an axial direction of the two nuts for receiving at least two steel balls. Two terminal openings of each of the through holes are defined in the surfaces of the preload piece facing the two opposite nuts. Three radial threaded holes are formed in the outer periphery of the preload piece, and the threaded holes are vertical to and in communication with the through holes. An adjusting member, an elastic member and an adjusting screw are received sequentially in the respective threaded holes. The steel balls in the through holes are pushed against the two nuts by the arc-shaped abutting surface of the adjusting member, the pushing of the steel balls can produce an adjustable preload, and can absorb the sudden increase of the pressure effectively, thus obtaining the objective of the present invention of outputting torque stably.

Abstract: 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 assembly difficulty is solved. The method of fixing the circulate components in the nut is that: the circulate component is formed with an axial hole and the radial hole that are connected to each other, the axial hole of the circulate component is aligned to the axial locking hole of the nut, and then liquid resin is injected into the axial hole of the circulate components, and the liquid resin will form a locking members after curing, thus fixing the circulate component in the nut. Due to the formation of the locking member is determined by the diameter of the hole to be machined, the configuration of locking member will be varied in response to the diameter of the hole to be machined. Whatever the diameter of the hole to be machined changes or not, it will not affect the interchangeability of the locking member.