CN106285488A - 伸缩钻头 - Google Patents

伸缩钻头 Download PDF

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CN106285488A
CN106285488A CN201510012019.2A CN201510012019A CN106285488A CN 106285488 A CN106285488 A CN 106285488A CN 201510012019 A CN201510012019 A CN 201510012019A CN 106285488 A CN106285488 A CN 106285488A
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bend
crank slot
blade
drilling pipe
pin
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CN106285488B (zh
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张新强
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Weihaiwei Hard Tools Co Ltd
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Abstract

本发明公开一种伸缩钻头,旨在提供一种既能自动伸缩钻头刀片,又能在一个钻头上可选择多种大小桩径组合的钻头。其结构是有固定刀片、伸缩刀片、曲轨、销、限位销、钻尖、钻筒,固定刀片焊接在钻筒上,上有长通槽;伸缩刀片上有圆通孔;曲轨上有曲槽,在曲槽两边有多对限位孔。销穿过曲槽、圆通孔、长通槽,当钻简旋转时,固定刀片随之旋转,销沿着长通槽和曲槽移动,碰到插在限位孔上的限位销时,停止移动,伸缩刀片也同时停止伸出或缩进。限位销插在不同的限位孔上就能得到不同的大小径组合。

Description

伸缩钻头
技术领域
本发明涉及一种打桩用的钻头。
背景技术
“地基处理理论与实践——第九届全国地基处理学术讨论会文集”中,“钉型水泥士搅拌桩处理软土地基的试验研究”一文,及ZL200520077017.3[P].2007-5-2,介绍一种通过钻杆正反向旋转而使钻头扩大或缩小的钻头。该钻头的不足之处是伸展叶片成功率低,故需将钻头提升至地面检查叶片是否打开,如未打开,则要人工打开,每个钻头只有一种大小径组合,若需不同组合,则要另换钻头。
发明内容
本发明克服了现有技术的上述不足,提供一种既能自动伸缩刀片以改变直径,又在一个钻头可供选择多种不同大小径组合的钻头。
本发明采用如下技术方案:一种伸缩钻头,由伸缩刀片、固定刀片、曲轨、销、钻筒、钻尖组成,固定刀片焊接在钻筒上,曲轨套在钻筒上,伸缩刀片、固定刀片、曲轨通过销连结。
固定刀片上有一长通槽,伸缩刀片有一圆通孔,曲轨上有一曲槽,曲槽从起始位到终止位逐渐远离旋转中心,销穿过曲槽、圆通孔和长通槽,当钻筒旋转时,固定刀片随之转动,通过销与固定刀片连接的伸缩刀片和曲轨也一起转动。
曲轨上焊有阻尼块,在不同位置开有多个限位孔,当钻筒反向旋转时,曲轨上的阻尼块受到土的阻力,使曲轨作相对固定刀片旋转方向相反的旋转,同时,销也沿曲槽和长通槽移动,带动伸缩刀片伸出或收缩,碰到限位孔上的限位销时,停止伸缩。
本发明的有益效果是:一个钻头可有多种扩径、缩径组合,即一个钻头有多个钻头的功能;扩径和缩径均都准确有效。
附图说明
图1是本发明的主视图;
图2是图1的A-A剖视图。
具体实施方式
下面结合附图对本发明作进一步描述:
图1、图2是本发明的一个实施例,固定刀片2焊接在钻筒6上,其中心有一沿钻头径向的长通槽,伸缩刀片1上有一圆通孔,曲轨3套在钻筒6上,其上有曲槽,在曲槽两边不同位置有多对限位孔5,在曲轨上还焊有阻尼块8,钻尖7与钻筒6焊接,销4穿过曲轨3的曲槽、固定刀片2的长通槽、伸缩刀片的圆通孔。
当钻头按图1箭头方向旋转时,销4向钻筒6靠拢,带动伸缩刀片1收缩,当钻头逆箭头方向旋转时,销4向远离钻筒6方向移动,带动伸缩刀片1伸出,扩大钻径,当销4碰到限位孔5上的限位销9时,停止扩径,限位销9插入不同位置的限位孔,就能得到不同的桩径。

Claims (3)

1.一种伸缩钻头,由固定刀片、伸缩刀片、曲轨、钻筒、钻尖、销利限位销组成,其特征是所述固定刀片上有长通槽,所述伸缩刀片上有圆通槽,所述曲轨上有曲槽,销穿过所述的曲槽、圆通槽、长通槽,所述固定刀片和钻尖分别与所述钻筒焊接,所述曲轨套在所述钻筒上。
2.根据权利要求1所述的伸缩钻头,其特征是所述曲轨上的曲槽由靠近所述钻筒向离开所述钻筒弯曲延伸,曲槽两边有多对限位孔,所述曲轨上还焊有阻尼块。
3.根据权利要求1或2所述的伸缩钻头,其特征是在不同位置的所述限位孔上插入所述限位销,可得到不同的大小径组合。
CN201510012019.2A 2015-05-14 2015-05-14 伸缩钻头 Active CN106285488B (zh)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN85106187A (zh) * 1985-05-31 1987-02-18 东京制作所(株式会社) 底部扩孔用的桩孔挖斗及其挖掘方法
JPH116381A (ja) * 1997-06-17 1999-01-12 Asahi Chem Ind Co Ltd 掘削用拡大ヘッド
CN101144278A (zh) * 2006-10-29 2008-03-19 叶世昌 综合多功能钻孔灌注桩机
CN102383732A (zh) * 2011-07-20 2012-03-21 上海广联建设发展有限公司 一种分段式液压扩底钻斗
CN203171025U (zh) * 2012-09-11 2013-09-04 徐宝余 一种后扩底钻头
CN204920797U (zh) * 2015-05-14 2015-12-30 张新强 伸缩钻头

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN85106187A (zh) * 1985-05-31 1987-02-18 东京制作所(株式会社) 底部扩孔用的桩孔挖斗及其挖掘方法
JPH116381A (ja) * 1997-06-17 1999-01-12 Asahi Chem Ind Co Ltd 掘削用拡大ヘッド
CN101144278A (zh) * 2006-10-29 2008-03-19 叶世昌 综合多功能钻孔灌注桩机
CN102383732A (zh) * 2011-07-20 2012-03-21 上海广联建设发展有限公司 一种分段式液压扩底钻斗
CN203171025U (zh) * 2012-09-11 2013-09-04 徐宝余 一种后扩底钻头
CN204920797U (zh) * 2015-05-14 2015-12-30 张新强 伸缩钻头

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