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

Active Publication Date: 2021-08-13
HIWIN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The additional time spent trimming reflow components during assembly will lengthen assembly time
In addition, the deformation of the return element will also make the connection of the return channels of each return element inaccurate, making the ball circulation not smooth

Method used

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  • External circulation ball screw
  • External circulation ball screw
  • External circulation ball screw

Examples

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Embodiment Construction

[0037] In order to illustrate the structure and features of the present invention in detail, the following preferred embodiments are exemplified and described as follows with accompanying drawings.

[0038] Such as Figure 1 to Figure 5 As shown, the first preferred embodiment of the present invention provides an external circulation ball screw 10 , which includes a screw shaft 11 , a nut 12 , a cover 13 , two return elements 14 and a plurality of rolling elements 15 .

[0039] The screw shaft 11 has an external thread groove 111 .

[0040] The nut 12 is sheathed on the screw shaft 11 so as to move along the axial direction of the screw shaft 11. The nut 12 has an internal thread groove 121. The internal thread groove 121 of the nut 12 is connected to the screw shaft 11 The external thread grooves 111 together form a load path P1. A groove 122 is formed on the outer surface of the nut 12 , and two return holes 123 are formed in the groove 122 , and each of the return holes 1...

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PUM

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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.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H25/24
CPCF16H25/24
Inventor 孙溢隆杨家铭
Owner HIWIN TECH
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