Ball screw unit and linear guide system

Abstract

The invention discloses a ball screw device, which comprises: a screw, the outer circumference of which is provided with a continuous guide groove extending helically along the axial direction; A thread matrix and a second thread matrix, the first thread matrix and the second thread matrix are respectively provided with a first guide groove and a second guide groove, and the first guide groove is surrounded by the continuous guide groove. The first guide channel, the second guide groove and the continuous guide groove enclose the second guide channel; the ball, the ball is arranged in the first guide channel and the second guide channel; the retaining sleeve, its It is sheathed outside the wire mother; wherein: the first wire mother body and the second wire mother body are set in such a way that relative rotation is restricted and relative movement is allowed.

Description

technical field [0001] The invention relates to the field of transmission technology, in particular to a ball screw device and a linear guide rail system with the ball screw device. Background technique [0002] Knownly, a linear guide system (device) usually includes a ball screw device, a linear guide rail, and a slider sliding along the guide rail; the ball screw device includes a screw nut with a spiral guide groove on the inner wall, and a spiral guide groove on the outer periphery Grooved screw and ball; the screw nut and the slider are connected in a way that can move synchronously, the screw rod passes through the screw nut so that the two guide grooves on each of them form a closed spiral guide channel, and the ball is located in the guide channel So that the lead screw and the screw nut form a helical transmission pair, and the rotation of the lead screw drives the screw nut to move linearly, and then drives the slider to move linearly on the guide rail. [0003] ...

AI Technical Summary

Problems solved by technology

[0004] However, due to the inevitable machining error of the guide groove on the nut and the lead screw, especially the actual lead of the processed guide groove usually has an error with the design lead, and this error will vary with the required design. The increase of the number of turns of the channel increases due to accumulation, which leads to: the guide groove on the nut and the guide groove on the lead screw are more or less misaligned at each axial position on the lead screw. It will squeeze and interfere the balls, which will block the transmission or generate transmission impact, and accelerate the wear of the balls, nuts and screws

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