CN204277601U - 薄壁工件定心夹紧心轴 - Google Patents

薄壁工件定心夹紧心轴 Download PDF

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CN204277601U
CN204277601U CN201420730876.7U CN201420730876U CN204277601U CN 204277601 U CN204277601 U CN 204277601U CN 201420730876 U CN201420730876 U CN 201420730876U CN 204277601 U CN204277601 U CN 204277601U
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曾荣良
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CHONGQING HUANJI LOW CARBON ENERGY SAVING TECHNOLOGY DEVELOPMENT Co Ltd
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Abstract

本实用新型薄壁工件定心夹紧心轴，包括支座，所述支座上固定有一个螺母，所述螺母中螺纹配合有轴杆，所述轴杆的一端设有与螺母配合的螺纹，所述轴杆的另一端设有转动轴杆的手柄，所述轴杆的中部设有一个挡板，所述挡板与螺母之间依次设有支撑圈、波纹套和挡圈，所述挡圈和螺母接触。通过转动手柄，带动轴杆一并转动。由于轴杆的一端是螺纹插入固定在支座上的螺母中，导致轴杆在转动的过程中发生轴向移动。当需要夹紧工件时，驱动轴杆向螺母移动，位于轴杆上的挡板挤压支撑圈，通过支撑圈挤压与挡圈之间波纹套，使得波纹套发生压缩，压缩后波纹套均匀地径向扩张，将薄壁工件定心并且从内向外夹紧。

Description

薄壁工件定心夹紧心轴
技术领域
本实用新型涉及一种机械加工夹具，具体涉及一种薄壁工件定心夹紧心轴。
背景技术
心轴，用来支承转动工件只承受弯矩而不传递扭矩，有些心轴转动，如铁路车辆的轴等，有些心轴则不转动，如支承滑轮的轴等。根据轴工作时是否转动，心轴又可分为转动心轴和固定心轴。其中心轴：只承受弯矩而不传递扭矩；转轴既承受弯矩又传递扭矩；传动轴只传递扭矩而不承受弯矩，或弯矩很小。在加工薄壁工件特别是薄壁管件时，由于工件本身的强度有限，不能从外部进行夹紧，从外部夹紧会造成工件的损坏。考虑到不能从外部夹紧，只能从内部采用弹性涨套进行夹持。但是，弹性涨套一般是用金属制造，在对工件进行内部夹紧时，极易划伤或是损坏工件，造成工件的加工不符合使用的要求。
实用新型内容
本实用新型的目的在于提供一种薄壁工件定心夹紧心轴，通过结构上的调整能够对薄壁工件进行夹持和固定，并且不会在夹持的过程中损坏工件。
为达到上述目的，本实用新型的技术方案是：薄壁工件定心夹紧心轴，包括支座，所述支座上固定有一个螺母，所述螺母中螺纹配合有轴杆，所述轴杆的一端设有与螺母配合的螺纹，所述轴杆的另一端设有转动轴杆的手柄，所述轴杆的中部设有一个挡板，所述挡板与螺母之间依次设有支撑圈、波纹套和挡圈，所述挡圈和螺母接触。
采用上述技术方案时，通过转动手柄，带动轴杆一并转动。由于轴杆的一端是螺纹插入固定在支座上的螺母中，导致轴杆在转动的过程中发生轴向移动。当需要夹紧工件时，驱动轴杆向螺母移动，位于轴杆上的挡板挤压支撑圈，通过支撑圈挤压与挡圈之间波纹套，使得波纹套发生压缩，压缩后波纹套均匀地径向扩张，将薄壁工件定心并且从内向外夹紧。本实用新型结构简单，能够对薄壁工件进行夹持和固定，并且不会在夹持的过程中损坏工件。
进一步，所述波纹套上至少设有两层凸起的夹紧圈。该设置能够增加波纹套与工件的接触面积，进一步减小局部压强，防止工件变形。
进一步，所述挡板为圆形，所述挡板的外径与支撑圈的外径相同。该设置能够便于加工和使用。
进一步，所述波纹套上夹紧圈的截面形状为梯形。梯形的截面使得波纹套与薄板工件的接触为面接触，增大了接触面积。
附图说明
下面结合附图和具体实施方式对本实用新型作进一步详细的说明：
图1是本实用新型薄壁工件定心夹紧心轴实施例的结构示意图。
具体实施方式
如图1所示，本实用新型薄壁工件定心夹紧心轴，包括支座，支座上固定有一个螺母1，螺母1中螺纹配合有轴杆2，轴杆2的一端设有与螺母配合的螺纹；轴杆2的另一端设有转动轴杆的手柄3，轴杆2的中部设有一个挡板4，挡板4与螺母1之间依次设有支撑圈5、波纹套6和挡圈7，挡圈7和螺母1接触。挡板4为圆形，挡板4的外径与支撑圈5的外径相同。该设置能够便于加工和使用。波纹套6上设有两层凸起的夹紧圈，波纹套6上夹紧圈的截面形状为梯形。梯形的截面使得波纹套与薄板工件的接触为面接触，增大了接触面积，进一步减小局部压强，防止工件8变形。
采用上述技术方案时，通过转动手柄3，带动轴杆2一并转动。由于轴杆2的一端是螺纹插入固定在支座上的螺母1中，导致轴杆2在转动的过程中发生轴向移动。当需要夹紧工件8时，驱动轴杆2向螺母1移动，位于轴杆2上的挡板4挤压支撑圈5，通过支撑圈5挤压与挡圈7之间波纹套6，使得波纹套6发生压缩，压缩后波纹套6均匀地径向扩张，将工件8定心并且从内向外夹紧。本实用新型结构简单，能够对工件8进行夹持和固定，并且不会在夹持的过程中损坏工件8。
以上所述的仅是本实用新型的优选实施方式，应当指出，对于本领域的技术人员来说，在不脱离本实用新型构思的前提下，还可以作出若干变形和改进，这些也应该视为本实用新型的保护范围，这些都不会影响本实用新型实施的效果和专利的实用性。

Claims (4)

1.薄壁工件定心夹紧心轴，包括支座，所述支座上固定有一个螺母，所述螺母中螺纹配合有轴杆，所述轴杆的一端设有与螺母配合的螺纹，其特征是，所述轴杆的另一端设有转动轴杆的手柄，所述轴杆的中部设有一个挡板，所述挡板与螺母之间依次设有支撑圈、波纹套和挡圈，所述挡圈和螺母接触。
2.根据权利要求1所述的薄壁工件定心夹紧心轴，其特征是，所述波纹套上至少设有两层凸起的夹紧圈。
3.根据权利要求1所述的薄壁工件定心夹紧心轴，其特征是，所述挡板为圆形，所述挡板的外径与支撑圈的外径相同。
4.根据权利要求2所述的薄壁工件定心夹紧心轴，其特征是，所述波纹套上夹紧圈的截面形状为梯形。
CN201420730876.7U 2014-11-30 2014-11-30 薄壁工件定心夹紧心轴 Active CN204277601U (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104440335A (zh) * 2014-11-30 2015-03-25 重庆环际低碳节能技术开发有限公司 薄壁工件定心夹紧心轴

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104440335A (zh) * 2014-11-30 2015-03-25 重庆环际低碳节能技术开发有限公司 薄壁工件定心夹紧心轴

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