CN202667743U - Blade of impact drill - Google Patents
Blade of impact drill Download PDFInfo
- Publication number
- CN202667743U CN202667743U CN 201220376344 CN201220376344U CN202667743U CN 202667743 U CN202667743 U CN 202667743U CN 201220376344 CN201220376344 CN 201220376344 CN 201220376344 U CN201220376344 U CN 201220376344U CN 202667743 U CN202667743 U CN 202667743U
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- cutting edge
- blade body
- blade
- face
- edge face
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Abstract
The utility model discloses a blade of an impact drill, comprising a blade body, wherein a V-shaped cutting part with a left cutting edge and a right cutting edge is arranged at the top end of the blade body; a left-front cutting edge surface and a left-rear cutting edge surface are arranged at the both sides of the left cutting edge, and a right-front cutting edge surface and a right-rear cutting edge surface are arranged at the both sides of the right cutting edge; a middle cutting edge is formed at the junction of the left-rear cutting edge surface and the right-rear cutting edge surface; the left cutting edge and the right cutting edge are arranged in a staggering manner, one end of the middle cutting edge is connected with the left cutting edge, and the other end of the middle cutting edge is connected with the right cutting edge; a location groove is formed at the middle of the bottom end of the blade body; and the included angle between the left-front cutting edge surface and the side surface of the blade body, and the included angle between the right-front cutting edge surface and the side surface of the blade body are 43 degrees, and the included angle between the left-rear cutting edge surface and the side surface of the blade body, and the included angle between the right-rear cutting edge surface and the side surface of the blade body are 32 degrees. The blade of an impact drill disclosed by the utility model is convenient to be accurately located on a drill rod, and capable of increasing the machining efficiency thereof on the premise of ensuring the long service life thereof.
Description
Technical field
The utility model belongs to the cutter structure design field, is specifically related to a kind of percussion drill blade.
Background technology
Drill bit is made of with the blade that is fixed on the drilling rod top the drilling rod of cylindricality, is illustrated in figure 1 as the structural representation of a kind of percussion drill blade the most common on the market, and it comprises blade body 1; The top of described blade body 1 is provided with the V-arrangement cutting portion 4 that is made of left cutting edge 2 and right cutting edge 3; Its end section is flat face, when blade is installed, blade is welded on the drilling rod after in the slot that the bottom of blade is inserted the drilling rod top again.The blade of this kind structure has following shortcoming: (1) is because the bottom face of blade body 1 is flat face, thereby when being welded on it on drilling rod, be difficult for locating, the center line that blade occurs easily not with the centerline of drilling rod on same straight line, then cause in use fragile blade; (2) in order to improve the working (machining) efficiency of blade, usually add very little that man-hour, the staff can be with the angle processing at the cutting edge tip of blade, but easily causing the blade tipping, greatly shortened the service life of blade.
The utility model content
For the deficiency of pointing out in the background technology, the utility model provides a kind of percussion drill blade of being convenient to accurately be positioned on the drilling rod, and simultaneously, the percussion drill blade of this kind structure can guarantee to improve the blade working (machining) efficiency under its prerequisite with long service life.
The technical scheme that realizes the utility model purpose is:
A kind of percussion drill blade comprises blade body; The top of described blade body is provided with the V-arrangement cutting portion with left cutting edge and right cutting edge; Described left cutting edge both sides are provided with left front cutting edge face and left back cutting edge face, and described right cutting edge both sides are provided with right front cutting edge face and right back cutting edge face;
Described left back cutting edge face and right back cutting edge face junction form middle cutting edge; The setting of staggering of described left cutting edge and right cutting edge, an end of described middle cutting edge is connected with described left cutting edge, and its other end is connected with right cutting edge;
The center bottom of described blade body is provided with locating slot;
The side angle of described left front cutting edge face and right front cutting edge face and blade body is 43 degree, and the side angle of described left back cutting edge face and right back cutting edge face and blade body is 32 degree.
In the technique scheme, described locating slot has left side wall, right side wall and diapire, and described left side wall and right side wall are flat face, and described diapire is the arcwall face of indent.
In the technique scheme, the cross sectional shape of the bottom of described blade body is trapezoidal for standing upside down.
In the technique scheme, the left end of described blade body and the edge of right-hand member are provided with chamfering.
The utlity model has positive effect:
The center bottom of the blade body in the utility model is provided with locating slot; The side angle of described left front cutting edge face and right front cutting edge face and blade body is 43 degree, and the side angle of described left back cutting edge face and right back cutting edge face and blade body is 32 degree.Setting by locating slot can and be fixed on the drilling rod accurately with this blade convenience, thereby so that the central lines of the center line of blade and drilling rod guarantees that in use blade is not fragile; The inventor of present patent application finds that through test of many times the cutting edge that adopts above-mentioned angle to make can guarantee to improve the blade working (machining) efficiency under its prerequisite with long service life.
Description of drawings
Fig. 1 is a kind of forward view of conventional impact drill blade;
Fig. 2 is a kind of forward view of percussion drill blade in the utility model;
Fig. 3 is the right view of Fig. 2;
Fig. 4 is the top view of Fig. 3;
Reference numeral shown in the figure is;
The 1-blade body; The 11-left end; The 12-right-hand member; The 13-chamfering; The left cutting edge of 2-; The left front cutting face of 21-; The left back cutting face of 22-; The right cutting edge of 3-; The right front cutting face of 31-; The right back cutting face of 32-; 4-V shape cutting portion; The 5-locating slot; The 51-left side wall; The 52-right side wall; The 53-diapire; Cutting edge among the 6-.
The specific embodiment
(embodiment 1)
To shown in Figure 4, shown a kind of specific embodiment of the present utility model such as Fig. 2.Wherein, Fig. 2 is a kind of forward view of percussion drill blade in the utility model; Fig. 3 is the right view of Fig. 2; Fig. 4 is the top view of Fig. 3.
A kind of percussion drill blade as shown in Figures 2 and 3, comprises blade body 1; The top of described blade body 1 is provided with the V-arrangement cutting portion 4 with left cutting edge 2 and right cutting edge 3, and its center bottom is provided with locating slot 5; Described left cutting edge 2 both sides are provided with left front cutting edge face 21 and left back cutting edge face 22, and described right cutting edge 3 both sides are provided with right front cutting edge face 31 and right back cutting edge face 32; Described left back cutting edge face 22 forms middle cutting edge 6 with right back cutting edge face 32 junctions; The setting of staggering of described left cutting edge 2 and right cutting edge 3, an end of described middle cutting edge 6 is connected with described left cutting edge 2, and its other end is connected with right cutting edge 3; Described left front cutting edge face 21 and right front cutting edge face 31 are 43 degree with the side angle of blade body 1, and described left back cutting edge face 22 and right back cutting edge face 32 are 32 degree with the side angle of blade body 1.
For the ease of blade is installed on the drilling rod, the cross sectional shape of the bottom of the described blade body 1 in the present embodiment is trapezoidal for standing upside down, can be referring to Fig. 3.
Described locating slot 5 has left side wall 51, right side wall 52 and diapire 53, and described left side wall 51 and right side wall 52 are flat face, and described diapire 53 is the arcwall face of indent, adopts this structure can effectively avoid the blade in use can fracture.
The left end 11 of described blade body 1 and the edge of right-hand member 12 are provided with chamfering 13.
The advantage that present embodiment has:
The center bottom of the blade body 1 in the present embodiment is provided with locating slot 5; Described left front cutting edge face 21 and right front cutting edge face 31 are 43 degree with the side angle of blade body 1, and described left back cutting edge face 22 and right back cutting edge face 32 are 32 degree with the side angle of blade body 1.Setting by locating slot 5 can and be fixed on the drilling rod accurately with this blade convenience, thereby so that the central lines of the center line of blade and drilling rod guarantees that in use blade is not fragile; The inventor of present patent application finds that through test of many times the cutting edge that adopts above-mentioned angle to make can guarantee to improve the blade working (machining) efficiency under its prerequisite with long service life, has preferably result of use.
Obviously, above-described embodiment of the present utility model only is for the utility model example clearly is described, and is not to be restriction to embodiment of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give all embodiments exhaustive.And these belong to apparent variation or the change that connotation of the present utility model extends out and still belong to protection domain of the present utility model.
Claims (4)
1. a percussion drill blade comprises blade body (1); The top of described blade body (1) is provided with the V-arrangement cutting portion (4) with left cutting edge (2) and right cutting edge (3); Described left cutting edge (2) both sides are provided with left front cutting edge face (21) and left back cutting edge face (22), and described right cutting edge (3) both sides are provided with right front cutting edge face (31) and right back cutting edge face (32);
Described left back cutting edge face (22) forms middle cutting edge (6) with right back cutting edge face (32) junction; The setting of staggering of described left cutting edge (2) and right cutting edge (3), an end of described middle cutting edge (6) is connected with described left cutting edge (2), and its other end is connected with right cutting edge (3);
It is characterized in that:
The center bottom of described blade body (1) is provided with locating slot (5);
Described left front cutting edge face (21) and right front cutting edge face (31) are 43 degree with the side angle of blade body (1), and described left back cutting edge face (22) and right back cutting edge face (32) are 32 degree with the side angle of blade body (1).
2. percussion drill blade according to claim 1, it is characterized in that: described locating slot (5) has left side wall (51), right side wall (52) and diapire (53), described left side wall (51) and right side wall (52) are flat face, and described diapire (53) is the arcwall face of indent.
3. percussion drill blade according to claim 2 is characterized in that: the cross sectional shape of the bottom of described blade body (1) is trapezoidal for standing upside down.
4. each described percussion drill blade in 3 according to claim 1, it is characterized in that: the left end (11) of described blade body (1) and the edge of right-hand member (12) are provided with chamfering (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220376344 CN202667743U (en) | 2012-07-31 | 2012-07-31 | Blade of impact drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220376344 CN202667743U (en) | 2012-07-31 | 2012-07-31 | Blade of impact drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202667743U true CN202667743U (en) | 2013-01-16 |
Family
ID=47488676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220376344 Expired - Fee Related CN202667743U (en) | 2012-07-31 | 2012-07-31 | Blade of impact drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202667743U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107511936A (en) * | 2017-09-13 | 2017-12-26 | 乐清大勇新工具有限公司 | A kind of hard alloy impact blade and drill hammer |
-
2012
- 2012-07-31 CN CN 201220376344 patent/CN202667743U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107511936A (en) * | 2017-09-13 | 2017-12-26 | 乐清大勇新工具有限公司 | A kind of hard alloy impact blade and drill hammer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130116 Termination date: 20130731 |