CN104482158B - 一种精确旋转机构 - Google Patents

一种精确旋转机构 Download PDF

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CN104482158B
CN104482158B CN201410554858.2A CN201410554858A CN104482158B CN 104482158 B CN104482158 B CN 104482158B CN 201410554858 A CN201410554858 A CN 201410554858A CN 104482158 B CN104482158 B CN 104482158B
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bearing
screw
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ball screw
screw assembly
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CN104482158A (zh
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李毅
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Beijing Bohui Innovation Biotechnology Group Co Ltd
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BEIJING RUIGUANG INSTRUMENT Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H25/00Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20Screw mechanisms
    • F16H25/22Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
    • F16H25/2204Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H25/00Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20Screw mechanisms
    • F16H25/22Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
    • F16H25/2204Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls
    • F16H25/2209Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls with arrangements for taking up backlash
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K7/00Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10Structural association with clutches, brakes, gears, pulleys or mechanical starters

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

本发明提供了一种精确旋转机构,属于旋转机构技术领域。本发明所述滚珠丝杠副‑丝杆与滚珠丝杠副‑丝母转动连接,轴承二设置在支架的上部,轴承预紧碟簧设置在轴承二和滚珠丝杠副‑丝杆之间,所述转臂的一端靠在滚珠丝杠副‑丝母的一侧,转臂的另一端与转轴的一端相连接,转轴的另一端上安装有轴承一,拉簧的一端与支架相连接,拉簧的另一端与转臂相连接。本发明转轴用两个高精度轴承架起,运转平稳,旋转扭矩非常小,旋转的精度很高—­高精度轴承控制住了圆周跳动与轴向跳动的影响。高精度直线滚珠丝杠没有轴向间隙窜动,滚珠丝杠副与两个高精度轴承之间的安装间隙,用几组轴承预紧碟簧消除,碟簧安装要求:预紧后滚珠丝杠副无轴向传动间隙。

Description

一种精确旋转机构
技术领域
本发明涉及一种精确旋转机构,属于旋转机构技术领域。
背景技术
目前角度旋转机构通常分手动旋转机构和电动旋转机构。手动旋转机构不适合现代仪器自动化的发展。电动旋转机构一般采用蜗轮蜗杆结构,旋转角度虽然大,但由于啮合间隙问题和磨损问题,旋转角度的精度达不到要求。
发明内容
本发明的目的是为了解决上述现有技术存在的问题,即电动旋转机构一般采用蜗轮蜗杆结构,旋转角度虽然大,但由于啮合间隙问题和磨损问题,旋转角度的精度达不到要求。进而提供一种精确旋转机构。
本发明的目的是通过以下技术方案实现的:
一种精确旋转机构,包括:转臂机构、直线运动副、限位检测机构、拉簧、电机和传动机构,所述转臂机构包括轴承一、转轴和转臂,所述直线运动副包括支架、滚珠丝杠副-丝母、滚珠丝杠副-丝杆、轴承二和轴承预紧碟簧,所述滚珠丝杠副-丝母设置在支架内,滚珠丝杠副-丝杆与滚珠丝杠副-丝母转动连接,轴承二设置在支架的上部,轴承预紧碟簧设置在轴承二和滚珠丝杠副-丝杆之间,所述转臂的一端靠在滚珠丝杠副-丝母的一侧,转臂的另一端与转轴的一端相连接,转轴的另一端上安装有轴承一,电机的输出轴和滚珠丝杠-丝杆之间由传动机构传动连接,限位检测机构安装在支架上,拉簧的一端与支架相连接,拉簧的另一端与转臂相连接。
本发明结构简单、运行平稳、噪音小、故障率非常小,精度却很高。
本发明使用的轴承、滚珠丝杠是高精度标准化零件。转轴用两个5级高精度轴承架起,运转平稳,旋转扭矩非常小,旋转的精度很高—高精度轴承控制住了圆周跳动与轴向跳动的影响。1级高精度直线滚珠丝杠没有轴向间隙窜动,滚珠丝杠副与两个高精度轴承之间的安装间隙,用几组轴承预紧碟簧消除,碟簧安装要求:预紧后滚珠丝杠副无轴向传动间隙,旋转滚珠丝杠-丝杆可以轻松转动。用一定的压力压轴承预紧碟簧对侧轴端,可以压缩碟簧组。转臂通过拉簧,其一端始终靠紧滚珠丝杠-丝母,这样不会有极微小的空程。径向跳动在这个位置对系统影响非常小,就几乎不用考虑滚珠丝杠径向跳动0.005/87mm的这个误差了。
附图说明
图1为本发明精确旋转机构的结构示意图;
图2为图1的A向视图。
图中的附图标记1为转臂机构,2为直线运动副(一级精度滚珠丝杠),3为限位检测机构,4为拉簧,5为电机(步进电机或伺服电机)、6为传动机构,1-1为轴承一,1-2为转轴,1-3为转臂,2-1为支架,2-2为滚珠丝杠副-丝母,2-3为滚珠丝杠副-丝杆,2-4为轴承二,2-5为轴承预紧碟簧。
具体实施方式
下面将结合附图对本发明做进一步的详细说明:本实施例在以本发明技术方案为前提下进行实施,给出了详细的实施方式,但本发明的保护范围不限于下述实施例。
如图1和图2所示,本实施例所涉及的一种精确旋转机构,包括:转臂机构1、直线运动副2、限位检测机构3、拉簧4、电机5和传动机构6,所述转臂机构1包括轴承一1-1、转轴1-2和转臂1-3,所述直线运动副2包括支架2-1、滚珠丝杠副-丝母2-2、滚珠丝杠副-丝杆2-3、轴承二2-4和轴承预紧碟簧2-5,所述滚珠丝杠副-丝母2-2设置在支架2-1内,滚珠丝杠副-丝杆2-3与滚珠丝杠副-丝母2-2转动连接,轴承二2-4设置在支架2-1的上部,轴承预紧碟簧2-5设置在轴承二2-4和滚珠丝杠副-丝杆2-3之间,所述转臂1-3的一端靠在滚珠丝杠副-丝母2-2的一侧,转臂1-3的另一端与转轴1-2的一端相连接,转轴1-2的另一端上安装有轴承一1-1,电机5的输出轴和滚珠丝杠-丝杆2-3之间由传动机构6传动连接,限位检测机构3安装在支架2-1上,拉簧4的一端与支架2-1相连接,拉簧4的另一端与转臂1-3相连接。
所述电机5为步进电机或伺服电机。
所述直线运动副2为高精度滚珠丝杠。
所述轴承一1-1为两个。
本实施例的电机5转动带动滚珠丝杠副-丝母2-2做往复运动,转臂1-3的一端靠在运动的滚珠丝杠副-丝母2-2的一侧,并用拉簧4始终拉紧。转臂1-3的另一侧连接转轴1-2,转轴1-2用高精度轴承架起实现转动。用限位检测机构3控制转角范围。电机5转动,传动机构6带动滚珠丝杠-丝杆2-3转动,则滚珠丝杠-丝母2-2前或后运动。转臂1-3一端贴住运动的滚珠丝杠-丝母2-2。转臂1-3通过拉簧4一端始终贴紧滚珠丝杠-丝母2-2并随之运动。转轴1-2通过高精度轴承一1-1架起,转轴1-2的一端连接转臂1-3,转轴1-2的另一端连接需要转角的零件。电机5正反转动实现转臂1-3往复摆角。需要的转角通过转臂1-3长度与限位检测机构间距算出。
以上所述,仅为本发明较佳的具体实施方式,这些具体实施方式都是基于本发明整体构思下的不同实现方式,而且本发明的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本发明揭露的技术范围内,可轻易想到的变化或替换,都应涵盖在本发明的保护范围之内。因此,本发明的保护范围应该以权利要求书的保护范围为准。

Claims (4)

1.一种精确旋转机构,包括:转臂机构(1)、直线运动副(2)、限位检测机构(3)、拉簧(4)、电机(5)和传动机构(6),所述转臂机构(1)包括轴承一(1-1)、转轴(1-2)和转臂(1-3),所述直线运动副(2)包括支架(2-1)、滚珠丝杠副-丝母(2-2)、滚珠丝杠副-丝杆(2-3)、轴承二(2-4)和轴承预紧碟簧(2-5),其特征在于,所述滚珠丝杠副-丝母(2-2)设置在支架(2-1)内,滚珠丝杠副-丝杆(2-3)与滚珠丝杠副-丝母(2-2)转动连接,轴承二(2-4)设置在支架(2-1)的上部,轴承预紧碟簧(2-5)设置在轴承二(2-4)和滚珠丝杠副-丝杆(2-3)之间,所述转臂(1-3)的一端靠在滚珠丝杠副-丝母(2-2)的一侧,转臂(1-3)的另一端与转轴(1-2)的一端相连接,转轴(1-2)的另一端上安装有轴承一(1-1),电机(5)的输出轴和滚珠丝杠-丝杆(2-3)之间由传动机构(6)传动连接,限位检测机构(3)安装在支架(2-1)上,拉簧(4)的一端与支架(2-1)相连接,拉簧(4)的另一端与转臂(1-3)相连接。
2.根据权利要求1所述的精确旋转机构,其特征在于,所述电机(5)为步进电机或伺服电机。
3.根据权利要求1所述的精确旋转机构,其特征在于,所述直线运动副(2)为高精度滚珠丝杠。
4.根据权利要求1所述的精确旋转机构,其特征在于,所述轴承一(1-1)为两个。
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CN105445637A (zh) * 2015-11-12 2016-03-30 杭州长川科技股份有限公司 一种晶圆测试用高精度小角度旋转机构
CN105276116B (zh) * 2015-12-04 2018-05-08 成都普瑞斯数控机床有限公司 一种基于机床的无间隙圆弧摆动机构及其实现方法

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