CN2686772Y - Post-cutting drill bit - Google Patents

Post-cutting drill bit Download PDF

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Publication number
CN2686772Y
CN2686772Y CN 200420020872 CN200420020872U CN2686772Y CN 2686772 Y CN2686772 Y CN 2686772Y CN 200420020872 CN200420020872 CN 200420020872 CN 200420020872 U CN200420020872 U CN 200420020872U CN 2686772 Y CN2686772 Y CN 2686772Y
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CN
China
Prior art keywords
cutting
double
drill bit
bottom
rod
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CN 200420020872
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Chinese (zh)
Inventor
朱兵
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上海倍尔固建筑科技有限公司
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Priority to CN 200420020872 priority Critical patent/CN2686772Y/en
Application granted granted Critical
Publication of CN2686772Y publication Critical patent/CN2686772Y/en

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Abstract

The purpose of the utility model is to design a rear-cutting drilling head of which structure adopts two double-edge blades provided with a main cutting edge and a bottom cutting edge. The bottom cutting can also be conducted when the two side cutting is conducted and thus the rapid temperature elevating condition can not be generated by over friction and also the hole expanding efficiency is improved. The fixing mode of the double-edge blades is the contacting between surfaces and thus the stress is uniform in cutting and the service lives of the double-edge blades can be prolonged. Meanwhile, the bottom of a telescopic rod is sheathed with a spring and the back returning of the double-edge blades is completed by the back returning of the elastic force of the spring after hole expanding and thus the operation is very convenient.

Description

后切式钻头 Post-cut drill

技术领域 FIELD

本实用新型涉及一种钻头,尤其涉及一种应用在螺栓扩孔技术的后切式钻头。 The present invention relates to a drill, more particularly to a technique used in the bolt after cutting reaming drill bit.

背景技术 Background technique

钻头的好坏主要区别在钻头本身使用上的效率、寿命和方便程度,但目前的钻头产品只是基本上解决了扩孔这一技术难题,对于钻头本身的质量保证及使用寿命等问题并没有更多的考虑,导致目前扩孔使用的钻头存在着如下缺点:(1)参考图1a、1b所示分别为现有钻头在扩孔前后的结构示意图,现有钻头的结构对刀片的固定是采用点接触式,即通过固定轴1-4来固定刀片1-1,这种固定方式受力集中,容易造成轴部断开;(2)钻头采用在活塞筒1-2内设置一活塞1-3的活塞式伸缩方法,在扩孔结束后,刀片1-1的回收属于被动式,不方便;(3)刀片1-1的刀刃1-5尖部成锐角α,在切削时磨损太快,使用寿命降低;(4)刀片1-1的底部1-6在扩孔时将受到摩擦力而使刀片急剧升温,也影响刀片1-1的使用寿命;(5)刀片1-1靠一面切削一面摩擦扩孔,势必影响扩孔速度。 The main difference in the quality of drill efficiency of use, longevity and ease of drill itself, but the current drill reaming product just basically solved the technical problems, the drill itself for quality assurance and life issues and no more multi consideration led to the current use of the reaming drill exist the following disadvantages: (1) Referring to Figures 1a, 1b are shown in the schematic structural diagram of a conventional drill bit before and after reaming, the structure of the conventional drill is the use of the fixed blade point contact, i.e., by a fixed blade fixed shaft 1-4 to 1-1, such a force concentrated in a fixed manner, the shaft portion is likely to cause disconnection; (2) the drill bit using a piston disposed within the piston cylinder 1-2 1- the method of the telescopic piston 3, after reaming, 1-1 recovery blade belonging passive inconvenient; (3) insert 1-1 1-5 blade tip at an acute angle [alpha], wear too quickly during cutting, reduced service life; (4) the bottom of the blade reamer 1-1 1-6 when the friction force will be sharply raised blade, the blade can affect the life of 1-1; (5) on one side of the cutting blade 1-1 side friction reaming, reaming bound to affect the speed.

实用新型内容本发明为解决上述现有技术存在的问题,其目的就在于提供一种能提高扩孔效率并能延长刀片使用寿命的后切式钻头。 SUMMARY The present invention is to solve the prior art problems, it is an object thereof is to provide a reamer to improve cutting efficiency and to prolong the life of the drill bit blade.

为达上述目的,本实用新型的后切式钻头,其特点是包括:形成有内螺纹的钻杆;一连接杆,由一杆体和杆顶组成,其形成有贯穿所述杆体和杆顶的通孔,所述杆体外周形成有外螺纹以与所述钻杆的内螺纹旋配,所述杆顶形成有两个对称的开口;伸缩杆,其底部套设有弹簧,插入并穿过所述连接杆的通孔;形成有一缺口的垫片,套设于所述连接杆上;以及具有主刀刃和底部刃的两把双面刀片,在所述主刀刃一侧形成有一固定开口,并分别嵌设于所述连接杆对称的开口内。 To achieve the above object, the present invention after cutting drill bit, which is characterized by comprising: forming an inner threaded drill; a connecting rod, a body and a mast by a composition, which is formed through said rod body and the mast a through hole, the rod outer periphery is formed with an external thread of the drill rod with the internal threaded with said mast is formed with two symmetrical openings; telescopic rod, which sleeve is provided with a bottom spring, inserted through said connecting rod through hole; gasket is formed with a notch, provided on the connecting rod sleeve; and a main cutting edge and a bottom edge of the two-sided blade, a fixing opening formed on the side of the main cutting edge, and are embedded in the connecting rod symmetrically within the opening.

上述伸缩杆包括一腹部、一颈部和一底部。 It comprises a telescopic rod above the abdomen, a neck portion and a bottom portion.

上述伸缩杆的腹部直径略大于上述颈部和底部的直径。 Abdominal diameter of the telescopic rod slightly larger than said neck and bottom.

上述双面刀片的主刀刃与底部刀刃之间是形成一钝角。 Between the main cutting edges and the bottom edge of the insert is double-sided form an obtuse angle.

上述双面刀片通过上述垫片嵌设于上述固定开口而固定。 Via the double-sided insert shim embedded in the fixing opening is fixed.

上述双面刀片于其固定开口相对的一侧是与上述伸缩杆的腹部相接触的。 Double-sided blades fixed thereon opposite the opening side is in contact with the abdomen of the above-described telescopic rod.

上述通孔的直径与伸缩杆的腹部直径相配合。 Abdominal telescopic rod with a diameter of the through hole mate.

采用这样结构的后切式钻头,具有如下特点:(1)双面刀片的固定方式是面与面的接触,因此双面刀片在切削时受力均匀,可延长双面刀片的使用寿命;(2)在扩孔后,双面刀片的回收是靠套设于伸缩杆底部弹簧自身的弹力回复来完成的,属主动回收,操作方便;(3)双面刀片具有主刀刃与底部刀刃的双面刀刃,在进行两侧切削的同时还可进行底部切削,既不会出现摩擦过大造成的急剧升温情况,又提高了扩孔的效率。 After cutting drill bit using such a structure, it has the following characteristics: fixing means (1) is a double-sided insert with the surface of the contact surface, thus double-sided insert during cutting force uniform, extend the life of the double-sided insert; ( 2) after reaming, double-sided inserts is recovered by the spring sleeved on the bottom of the telescopic rod own elastic recovery to complete, active metal recovery, easy to operate; (3) double-sided inserts having a main cutting edge and the bottom edge of the edge surface, the cutting is performed simultaneously on both sides of the bottom may be cut, where rapid warming caused by excessive friction does not occur either, and improve efficiency of reaming.

为进一步说明本实用新型的上述目的、结构特点和效果,以下将结合附图对本实用新型进行详细的描述。 To further illustrate the present invention the above object, features and effects will be described in conjunction with the present invention in detail with the accompanying drawings.

附图说明 BRIEF DESCRIPTION

图1a是现有钻头在扩孔前的示意图。 Figure 1a is a schematic view of a conventional drill bit prior to reaming.

图1b是现有钻头在扩孔后的示意图。 Figure 1b is a schematic view of a conventional drill after reaming.

图2a是本实用新型的后切式钻头在扩孔前的示意图。 Figure 2a is a schematic diagram of the present invention prior to post-cut reaming drill.

图2b是本实用新型的后切式钻头在扩孔后的示意图。 FIG 2b is a schematic diagram of the present invention in the post-cut reaming drill.

图3a是伸缩杆的结构示意图。 Figure 3a is a schematic view of a telescopic rod.

图3b是连接杆的结构示意图。 Figure 3b is a schematic view of the connecting rod.

图3c是图3b的左视图。 3c is a left side view of Figure 3b.

图3d是垫片的结构示意图。 Figure 3d is a schematic view of the spacer.

图3e是双面刀片的结构示意图。 Figure 3e is a schematic view of the double-sided insert.

具体实施方式 Detailed ways

参考图2、3所示,本实用新型的后切式钻头,其结构包括:形成有内螺纹的一钻杆6;伸缩杆5,其腹部5-2的直径略大于颈部5-3和底部5-1的直径;连接杆2,包括杆体2-4和杆顶2-3,形成有贯穿杆体2-4和杆顶2-3的通孔2-1,杆体2-4外周形成有外螺纹以与钻杆6的内螺纹旋配,杆顶2-3形成有两个对称的开口2-2,通孔2-1的直径与伸缩杆5的腹部5-2直径相配合;形成有一缺口3-1的垫片3;具有主刀刃4-2和底部刀刃4-1的双面刀片4,在主刀刃的一侧形成有一固定开口4-3;以及弹簧7构成。 With reference to FIG. 2 and 3, the present invention after cutting drills, the structure comprising: a drill pipe with an internal thread 6 is formed; extendable rod 5, the diameter of which is slightly larger than the neck abdomen 5-2 and 5-3 5-1 the diameter of the bottom; the connecting rod 2, and comprises a rod mast 2-4 2-3, and 2-1 are formed through the outer periphery of the through hole of the rod mast 2-3 2-4 2-4 rod is formed with a with the male screw threaded with the drill rod 6, 2-3 mast formed with two symmetrical openings 2-2, 2-1 of the through hole with the diameter of the extendable rod 5 abdominal diameter cooperates 5-2; formed 3-1 has a cutout gasket 3; double-sided insert having a bottom edge and the main cutting edge 4-2 4-1 4, on one side of the main cutting edges is formed a fixing opening 4-3; 7, and a spring configured.

各部件的连接方式为,在伸缩杆5的底部5-1套设弹簧7后,插入并穿过连按杆2的通孔2-1;将垫片3从连接杆2具有外螺纹的杆体2-4底端套入连接杆2;旋转垫片3使其缺口3-1与连接杆2的其中一个开口2-2重合后,放入一把双面刀片4,使刀片背部4-4与伸缩杆5的腹部5-2相接触固定,再次旋转垫片3使缺口3-1与连接杆2的另一开口2-2重合后,再放入另一把双面刀片4,接着将垫片3稍稍旋转,直到使缺口3-1与任意一开口2-2不重合处,这样两把双面刀片4就分别嵌设于连接杆2两对称的开口2-2内,并靠垫片3嵌设于固定开口4-3而被固定;最后将连接杆2的杆体2-4旋入钻杆6内。 Each connection member is, in the bottom of the extendable rod 5 5-1 sleeved spring 7, and is inserted through the through hole 2 is connected by rods 2-1; the gasket 3 from the connecting rod 2 has an external thread 2-4 into the bottom end of the connecting rod sleeve 2; 3 rotating shim and the notch so that the connecting rod 2 wherein one of the openings coincides 2-2 3-1, placed in a double-sided blade 4, the blade back 4-4 5-2 the fixed contact with the abdomen of the extendable rod 5, the spacer 3 is again rotated so that the notch and the other connecting rod 3-1 2 2-2 coincident openings, then put into another double-sided insert 4, then pad 3 is slightly rotated until the notch so that any one of 3-1 and 2-2 do not overlap at the opening, so that it is two-sided blade 4 are embedded in the connecting rod 2 two symmetrical openings 2-2 and cushion sheet 3 embedded in the fixing opening 4-3 is fixed; finally connecting the lever member 2 is screwed into the drill pipe 6 2-4.

本实用新型的后切式钻头是靠伸缩杆5的伸缩来使双面刀片4张开从而达到扩孔的目的。 The present invention after cutting by the drill bit is telescopic extendable rod 5 to the double-sided blade 4 is opened so as to achieve the purpose of the counterbore. 当伸缩杆5处于正常不受力状态时,两双面刀片4收入连接杆2的开口2-2内,可自由进入普通钻头已钻好的直孔中,如图2a扩孔前示意图。 When the extendable rod 5 is in a normal unstressed state, two double-sided insert opening 4 Income connecting rod 2 within 2-2, the drill has free access to an ordinary straight hole drilled in a schematic front counterbore 2a in FIG. 当进入直孔底部时,稍微加压旋转钻杆6,弹簧7下压伸缩杆5,双面刀片4即可缓缓张引,从而将原先的直孔孔底切削成锥形孔,如图2b扩孔后的示意图。 When entering the bottom of the straight hole, the rotating drill pipe 6 is slightly pressurized, the extendable rod 7 is pressed against the spring 5, gradually to the double-sided blades 4 lead sheets, so that the originally straight bore hole bottom cut into a tapered hole as 2b a schematic view of the reamer. 扩孔完毕后,稍稍提起钻杆6,则弹簧7在弹性回复力的作用下将双面刀片4回收到原来的位置。 After reaming is completed, the drill rod 6 is slightly lifted, the spring 7 under the elastic restoring force of the double-sided insert 4 recovered to the original position.

根据如上所述的本实用新型的后切式钻头具备如下的优点:(1)本实用新型后切式钻头的双面刀片4是通过刀片背部4-4与伸缩杆腹部5-2接触相固定,用垫片3限位,这种固定方式是通过面与面相接触固定,因此双面刀片4在切削时受力均匀,可延长双面刀片4的使用寿命;(2)在扩孔后,双面刀片4的回收是靠套设于伸缩杆5底部5-1弹簧7自身的弹力回复来完成的,属主动回收,操作方便; Has the following advantages according to the present invention after cutting drill bit as described above: (1) the present invention post-cut double-sided insert the drill bit 4 via the contact blade is fixed to the telescopic rod back and abdomen 5-2 4-4 , stopper pad 3, which is fixedly secured by the contact surface with the surface, thus the double-sided blade 4 during cutting force uniform, extended service life of the double-sided blade 4; (2) after reaming, sided blade 4 is recovered by the extendable rod 5 is sleeved on the bottom 5-1 of the spring 7 itself elastic recovery to complete, active metal recovery, easy to operate;

(3)双面刀片4的主刀刃4-2 与底部刀刃4-1之间成一钝角β,在切削时,经得起考验,且由于具有双面刀刃,在进行两侧切削的同时还可进行底部切削,既不会出现摩擦过大造成的急剧升温情况,又提高了扩孔的效率。 (3) double-sided main cutting edge 4 of the blade at an obtuse angle β between the bottom edge 4-2 and 4-1, during cutting, stand up, and at the same time since the double-sided cutting edge, the cutting is performed on both sides may also be were cutting the bottom, neither rapid warming the friction caused by too much, but also improves the efficiency of reaming.

综上所述,本实用新型的后切式钻头在现有结构的基础上,对钻头本身的使用上的结构作了大幅度的改进,对施工来说是更好的选择,可广泛应用在在程中。 In summary, the present invention after cutting drill bit based on the existing structure, made significant improvements to the structure itself using a drill, the construction is the better choice, it can be widely used in in the process.

虽然本实用新型已参照当前的具体实施例来描述,但是本技术领域中的普通技术人员应当认识到,以上的实施例仅是用来说明本实用新型,在没有脱离本实用新型精神的情况下还可作出各种等效的变化和修改,因此,只要在本实用新型的实质精神范围内对上述实施例的变化、变型都将落在本实用新型权利要求书的范围内。 Although the present invention will be described with reference to the current has specific embodiments, those skilled in the art should recognize that the above embodiments are only used to illustrate, in the present invention without departing from the spirit of the present invention It may be made of various equivalent modifications and variations, so long as within the true spirit of the invention variations of the above embodiments, variations of the present invention will fall within the scope of the claims.

Claims (7)

1.一种后切式钻头,其特征在于包括:形成有内螺纹的钻杆;一连接杆,由一杆体和杆顶组成,其形成有贯穿所述杆体和杆顶的通孔,所述杆体外周形成有外螺纹以与所述钻杆的内螺纹旋配,所述杆顶形成有两个对称的开口;伸缩杆,其底部套设有弹簧,插入并穿过所述连接杆的通孔;形成有一缺口的垫片,套设于所述连接杆上;以及具有主刀刃和底部刀刃的两把双面刀片,在所述主刀刃一侧形成有一固定开口,并分别嵌设于所述连接杆对称的开口内。 A post-cut drill bit, comprising: forming a drill pipe with an internal thread; a connecting rod, a body and a mast, whose through hole is formed through the shaft and the top of the pole, the rod outer periphery is formed with an external thread of the drill rod with the internal threaded with said mast is formed with two symmetrical openings; telescopic rod, which sleeve is provided with a bottom spring, inserted through the connecting rod a through hole; gasket is formed with a notch, provided on the connecting rod sleeve; and a double-sided insert having two main cutting edges and a bottom edge, there is formed a mounting opening in the side of the main cutting edges, and are embedded in said connecting rod symmetrical inner opening.
2.如权利要求1所述的后切式钻头,其特征在于:所述伸缩杆包括一腹部、一颈部和一底部。 2. After cutting drill bit according to claim 1, characterized in that: said telescopic rod comprises a belly, a neck portion and a bottom portion.
3.如权利要求2所述的后切式钻头,其特征在于:所述伸缩杆的腹部直径略大于所述颈部和底部的直径。 3. After the cutting drill bit according to claim 2, characterized in that: the telescopic shaft diameter slightly greater than the diameter of the neck and the abdomen bottom.
4.如权利要求1所述的后切式钻头,其特征在于:所述双面刀片的主刀刃与底部刀刃之间是形成一钝角。 4. After the cutting drill bit according to claim 1, wherein: between said double-sided main cutting edge insert is formed with a bottom edge an obtuse angle.
5.如权利要求1所述的后切式钻头,其特征在于:所述双面刀片通过所述垫片嵌设于所述固定开口而固定。 5. The post-cut drill according to claim 1, wherein: said double-sided insert embedded in the spacer by fixing the fixing opening.
6.如权利要求1或2所述的后切式钻头,其特征在于:所述双面刀片于其固定开口相对的一侧与所述伸缩杆的腹部相接触。 6 after cutting drill bit of claim 1 or claim 2, wherein: said double-sided insert fixed thereon opposite to the opening side of the abdomen of the telescopic rod in contact.
7.如权利要求1或2所述的后切式钻头,其特征在于:所述通孔的直径与伸缩杆的腹部直径相配合。 7 after cutting drill bit of claim 1 or claim 2, wherein: the abdomen and the telescopic rod diameter of the through hole mate.
CN 200420020872 2004-03-05 2004-03-05 Post-cutting drill bit CN2686772Y (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012139435A1 (en) * 2011-04-14 2012-10-18 Li Guozhong Specialized drill bit for deep hole inverted t-shaped pile and formation method thereof
CN103967414A (en) * 2014-05-19 2014-08-06 郑州神利达钻采设备有限公司 Drill with each drill piece provided with two working faces
CN106061697A (en) * 2014-03-04 2016-10-26 木构造系统株式会社 Device for forming expanded hole section
CN106903349A (en) * 2017-04-27 2017-06-30 湖北武大珞珈工程结构检测咨询有限公司 Reamer bit for electric drill

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012139435A1 (en) * 2011-04-14 2012-10-18 Li Guozhong Specialized drill bit for deep hole inverted t-shaped pile and formation method thereof
CN106061697A (en) * 2014-03-04 2016-10-26 木构造系统株式会社 Device for forming expanded hole section
US9849606B2 (en) 2014-03-04 2017-12-26 Mokukouzou System Co., Ltd. Device for forming expanded hole section
CN103967414A (en) * 2014-05-19 2014-08-06 郑州神利达钻采设备有限公司 Drill with each drill piece provided with two working faces
CN106903349A (en) * 2017-04-27 2017-06-30 湖北武大珞珈工程结构检测咨询有限公司 Reamer bit for electric drill

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