The utility model provides a screw, comprising a screw rod and a cap screw, and the cap is fixedly connected with the screw thread part includes integrally formed, and a conical tapping head, the screw thread part is fixedly connected with the conical tapping head are integrally molded; the conical tapping head are respectively arranged on two sides of a flat cone; the tapping head along the thread direction is also arranged on the protection of the ear; ear protection is larger than the width of the conical head tapping width; protect the ears are symmetrically arranged at both sides along the thread direction; with symmetrically arranged at both sides along the direction of the two screw part of ear protection as a group, the protective ear is equipped with N (N = 1) group. Can effectively increase the screw into the nail into the area, the stress area increases, heat can be reduced by the unit area, avoid conical tapping head damage in the working condition, the protection of the ear is larger than the width of the tapping head width, can first burned, can effectively protect the safety of the head tapping screws, guarantee.
【技术实现步骤摘要】
一种螺丝
本技术涉及固定工具
,尤其涉及一种螺丝。
技术介绍
螺丝包括头部和螺纹部,人们常见的螺丝的头部和螺纹部呈一整体,且一般选用的的材质大多为铁系金属,铁系金属制成的螺丝具有高强度、比重大、可吸磁、易电镀、易锻造加工等优点,但也有其易生锈、密合度差、无法防松等缺点;近年来,发展了一种由塑料材质制成的螺丝,塑料螺丝具有弹性、易注射成型等优点,但现有塑料螺丝紧固件无法为磁性工具吸着,在应用于自动装配线,装配速度较铁系金属制成的螺丝慢,亦会有锁紧不确实甚或螺丝上锁作业中掉落问题。此外,现有螺丝结构包括螺杆和螺帽,螺帽外表面设有一字口或十字口,当螺丝连接物件时,螺帽位于物件表面外侧,螺帽在物件表面会形成突起,影响了物件外观,特别是螺帽经过和螺丝刀磨擦后,螺帽表面会生锈,更加影响了物件美观。上述列举的两种问题,是一直困扰着技术人员的关键问题。为了解决上述问题,中国专利CN201747740U提供了一种螺丝,包括螺杆和螺帽,其特征在于:所述螺帽内表面间隔突出齿牙,靠近螺帽侧的螺杆表面设有一圈突起,突起与齿牙相离,突起与齿牙相离的距离为3-8毫米。该技术方案通过在螺帽 ...
【技术保护点】
一种螺丝,包括螺杆(2)和帽盖(1),螺杆(2)与帽盖(1)固定连接,一体成型,其特征在于:所述螺杆(2)包括螺纹部(21)和圆锥状自攻头(22),该螺纹部(21)与圆锥状自攻头(22)固定连接,一体成型;所述圆锥状自攻头(22)两侧分别设置有一个扁平面(221);所述圆锥状自攻头(22)沿着螺纹部(21)方向上还设置有保护耳(23);所述保护耳(23)的宽度大于圆锥状自攻头(22)的宽度;光滑座面(11)上设置有3个刀棱(12),3个刀棱(12)均匀分布在光滑座面(11)表面,且设置有贯穿面;所述扁平面(221)分别设置在圆锥状自攻头(22)两侧的上、下表面,且以圆锥状自 ...
【技术特征摘要】
1.一种螺丝,包括螺杆(2)和帽盖(1),螺杆(2)与帽盖(1)固定连接,一体成型,其特征在于:所述螺杆(2)包括螺纹部(21)和圆锥状自攻头(22),该螺纹部(21)与圆锥状自攻头(22)固定连接,一体成型;所述圆锥状自攻头(22)两侧分别设置有一个扁平面(221);所述圆锥状自攻头(22)沿着螺纹部(21)方向上还设置有保护耳(23);所述保护耳(23)的宽度大于圆锥状自攻头(22)的宽度;光滑座面(11)上设置有3个刀棱(12),3个刀棱(12)均匀分布在光滑座面(11)表面,且设置有贯穿面;所述扁平面(221)分别设置在圆锥状自攻头(22)两侧的上、下表面,且以圆锥状自攻头(22)的中心为对称轴对称设置。2.根据权利要求1所述的螺丝,其特征在于:所述保护耳(23)对称设置在沿着螺纹部(21)方向两侧;所述以对称设置在沿着螺纹部(21)方向两侧的保护耳(23)为一组,所述保护耳(23)设置有N(N≥1...
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