The embodiment of the utility model provides a bolt and a nut. The bolt includes a body, which has a plurality of hobbing teeth in the vertical direction. The height of at least two hobbing teeth are different, and the height of the highest hobbing teeth is greater than the thickness of sheet metal parts. The height of the hobbing teeth decreases spirally along the periphery of the body. The difference between the height of the highest and lowest hobbing teeth is more than twice the thickness of sheet metal parts. The edges of the hobbing teeth are arranged at intervals of multiple points. The bolt also includes a support part, which is fixedly connected with the bottom of the body. The top of the body is chamfered. The bolt provided in the embodiment of the utility model has a plurality of Unequal-height knurling teeth, thereby reducing the bolt clamping force consumed when pressing the sheet metal hole into the bolt knurling, improving the remaining effective clamping force of the bolt, and reducing the possibility of sheet metal loosening. The nut provided by the utility model has a step through hole, which can avoid interference between the threaded part of the nut and the knurling tooth part of the bolt.
【技术实现步骤摘要】
螺栓和螺帽
本技术涉及螺栓和螺帽,特别涉及具有不等高滚花齿的螺栓,以及与所述螺栓相适应的螺帽。
技术介绍
目前,广泛采用的是普通螺栓与普通螺帽相匹配,以实现被紧固件之间的连接,借助被紧固件之间的摩擦力来抵抗切向载荷,摩擦力仅仅是螺栓夹紧力的10~20%。而重载荷紧固点需要很高的螺栓夹紧力,导致螺栓粗大笨重,需要占用很大的空间。如图1所示,现有技术中的滚花螺栓(即螺栓的本体11上具有竖直方向上的多个等高滚花齿111)和普通螺帽与钣金件2上的钣金孔进行过盈配合,使钣金孔侧壁与滚花螺栓的挤压力也用来抵抗切向载荷,摩擦力可以达到螺栓夹紧力的40~80%,比普通螺栓的效果提高了3~4倍。但是,使用普通的滚花螺栓,在将钣金孔压入螺栓滚花时会消耗掉一部分螺栓夹紧力,被消耗的螺栓夹紧力太多时甚至无法将钣金件压到螺栓底部,容易造成钣金件松动,因此,大大限制了滚花螺栓的应用。
技术实现思路
有鉴于此,实际应用中迫切需要一种只需消耗较少的螺栓夹紧力就能够实现滚花螺栓与钣金件进行过盈配合的技术方案。本技术的实施例提供了一种螺栓,所述螺栓包括本体,所述本体具有竖直方向的多个滚花齿,其中至少两个 ...
【技术保护点】
1.一种螺栓,其特征在于,所述螺栓包括本体,所述本体具有竖直方向的多个滚花齿,其中至少两个滚花齿的高度不相等,并且最高的滚花齿的高度大于欲连接的钣金件的厚度。
【技术特征摘要】
1.一种螺栓,其特征在于,所述螺栓包括本体,所述本体具有竖直方向的多个滚花齿,其中至少两个滚花齿的高度不相等,并且最高的滚花齿的高度大于欲连接的钣金件的厚度。2.根据权利要求1所述的螺栓,其特征在于,所述滚花齿的高度沿所述本体的外周呈螺旋递减。3.根据权利要求2所述的螺栓,其特征在于,最高的滚花齿与最低的滚花齿的高度之差大于钣金件厚度的2倍。4.根据权利要求1所述的螺栓,其特征在于,所述滚花齿的边缘为间隔的断点状。5.根据权利要求1所述的螺栓,其特征在于,所述螺栓还包括支撑部,所述支撑部与所述本体的底部固定连接。6.根据权利要求1所述的螺栓,其特征在于,所述本体的顶部具有倒角。7...
【专利技术属性】
技术研发人员:晋占峰,
申请(专利权)人:上汽通用汽车有限公司,泛亚汽车技术中心有限公司,
类型:新型
国别省市:上海,31
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