External circulation ball screw

A ball screw, external circulation technology, applied in the direction of transmission, belt/chain/gear, mechanical equipment, etc., can solve the problems of inaccurate connection of the return path, unsmooth ball circulation, prolonged assembly time, etc., to improve assembly efficiency, The effect of saving mold cost and shortening the required length
CN110541917BActive Publication Date: 2021-08-13HIWIN TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HIWIN TECH
Publication Date
2021-08-13

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Abstract

An external circulation ball screw includes a screw shaft, a nut, a cover body, a return element and a plurality of rolling parts. A groove is formed on the outer surface of the nut, and two return holes are formed in the groove. The first stage passing through the nut in the groove has a first half return channel, the second stage in the cover body has a second half return channel, and the second half return channel and the first half return channel jointly form a return channel. Alternatively, a third stage with a return hole is formed in the cover body or the screw cap in the groove. Allows users to use return elements of the same size with return channels of different lengths.
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Description

technical field

[0001] The invention relates to a ball screw, in particular to an external circulation ball screw. Background technique

[0002] The general ball screw is divided into internal circulation type and external circulation type. When used in high load conditions, most of the external circulation ball screws are used. For example, Taiwan Patent No. I509169 discloses an external circulation ball screw, which connects the return passages of the two return elements arranged in the groove, so that the balls can circulate to make the ball screw operate smoothly.

[0003] However, the aforementioned external circulation type ball screw causes the following problems:

[0004] 1. For nuts of different lengths (the number of coils is different), it is necessary to set up reflow element molds of different sizes so that the reflow channels of each reflow element installed in the nut can be connected with each other, which increases the production cost.

[0005] 2. The ref...

Claims

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