CN202810663U

CN202810663U - Improving structure of drill bit

Info

Publication number: CN202810663U
Application number: CN 201220379928
Authority: CN
Inventors: 陈兴宽
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-07-31
Filing date: 2012-07-31
Publication date: 2013-03-20
Anticipated expiration: 2022-07-31

Abstract

An improving structure of drill bit comprises a drill bit body which is provided with a cutting edge end and a tail end case and characterized in that the improving structure is also provided with drill bit teeth on the wall body of the tail end case. The drill bit teeth are made of hard alloy materials and weld in the matched gap which is corresponding to the position of the tail end case in an embedded mode. The outer circle of wall body of the tail end case is an ellipse and the wall body of the tail end body is a thick wall where the drill bit teeth are arranged along the direction of the major axis of the ellipse. One improvement is that the teeth top portion of the cutting edge end is provided with a saw-tooth gap which is capable of strengthening the sharpness. According to the improving structure, the added drill bit teeth weld on the wall body tightly and firmly, the forced structure is reasonable, the fracture of the tail end case is impossible, the large space between the tail end case and the rock hole ensures the rock debris to be removed smoothly and further enhances the anti-block function.

Description

The improvement structure of bore bit

Technical field

The utility model relates to a kind of drill bit structure of rock drilling machine, and especially a kind of bore bit that can effectively prevent is stuck in the bore bit improvement structure in pricker hole.

Background technology

Prior art is used for the rock drilling machine in Drilling big gun hole, the drill steel of rotation drives the bore bit rotation, usually occur bore bit in the construction and be stuck in situation in the petrosal foramen, the time-consuming processing of palpus, when running into situation about can't get rid of behind the bit freezing, can only abandon drill steel, bore bit, in addition perforate, not only increased Drilling cost, operating efficiency also reduces greatly.Number be that 200620008013.4 Chinese patent discloses a kind of Seizing-proof rock-drill bit, technical scheme is at the bore bit tail end two tabular flank blades to be installed, when pulling out pricker, the flank blade can broken obstruction place landwaste, bore bit is taken out smoothly, but its bore bit tail end structure easily breaks, affected and promoted the use of.It number is 200720123043.4 Chinese patent, increased the thickness of bore bit rear end, increased the steadiness of anti-sticking blade, but the anti-sticking blade is the middle part that is arranged at bore bit rear end wall body, cutting edge keeps clear of the outer wall of wall body, and the function of broken removing obstruction place landwaste is relatively poor.

The utility model content

Problem to be solved in the utility model is to provide a kind of improvement structure of bore bit, can prevent effectively that card pricker phenomenon from occuring.

The utility model adopts following technical scheme: comprise the bore bit main body, described bore bit main body is provided with cutting edge end and tail end cover, it is characterized in that: also comprise and move back the pricker tooth on the wall body of being located at tail end cover, the described pricker tooth that moves back is Hardmetal materials, move back in the embedded breach that matches that is welded in tail end cover correspondence position of pricker tooth, the cylindrical of the wall body of described tail end cover is oval, and the thickness of the wall body of described tail end cover is thick type wall at the long axis direction of ellipse, moves back the pricker tooth and is located on the thick type wall.Its principle is: the cutting edge end of bore bit main body is fixed with carbide-tipped cutter bit, be circular in the middle of the bore bit main body, diameter is slightly less than the cutting edge length of cutting edge end, in the rock drilling process landwaste from peripheral clearance with the wind or water discharge, the tail end cover of bore bit main body is the easiest position of being blocked by landwaste with the joint portion of drill steel.Though the flank blade that prior art is set up can be brought into play the effect of the landwaste of broken obstruction place, its structure causes the tail end structure easily to be broken.The utility model is set up moves back the pricker tooth, is located on the wall body of thick type wall of tail end cover, and it welds fastening firm and solid, and force structure is reasonable, can not cause the tail end cover to break.Pull out pricker when operation, move back the landwaste that the pricker tooth can broken obstruction place, bore bit is taken out in smoothly dredging boring.Because its cylindrical is oval, the inner circle size constancy.Oval short-axis direction is non-thickening position, herein and the gap that forms between petrosal foramen ensured and the smooth eliminating of landwaste further strengthened the anti-sticking function.

A kind of improvement is, described cutting edge end is the yi word pattern blade, and the long axis direction of described ellipse is consistent with the cutting edge bearing of trend of yi word pattern blade, the little 2mm of length of the cutting edge of the described yi word pattern blade of the Length Ratio of the major axis of described ellipse.

The another kind of improvement is that the crown section of described cutting edge end is located at a pair of sharp mouth breach of strengthening sharpness.This structure can strengthen the sharpness of the crown of cutting edge end, improves the rock drilling operating efficiency.

The utility model is set up moves back the pricker tooth, and fastening firm and solid in the wall body welding, force structure is reasonable, can not cause the tail end cover to break.The gap that forms between tail end cover of the present utility model and petrosal foramen is larger, has ensured the smooth eliminating of landwaste, has further strengthened the anti-sticking function.

Description of drawings

Fig. 1 is a kind of embodiment stereochemical structure of the utility model (showing the cutting edge end) schematic diagram.

Fig. 2 is a kind of embodiment stereochemical structure of the utility model (showing the tail end cover) schematic diagram.

Fig. 3 is main TV structure schematic diagram of the present utility model.

Fig. 4 is the right TV structure schematic diagram of Fig. 3.

Fig. 5 is the structural representation of looking up of Fig. 3.

The specific embodiment

Extremely shown in Figure 5 such as Fig. 1, a kind of embodiment of the utility model comprises bore bit main body 1, described bore bit main body 1 is provided with cutting edge end 2 and tail end cover 3, it is characterized in that: also comprise and move back pricker tooth 4 on the wall body of being located at tail end cover 3, the described pricker tooth 4 that moves back is Hardmetal materials, move back that pricker tooth 4 is embedded to be welded in the breach that matches that tail end overlaps 3 correspondence positions, the cylindrical of the wall body of described tail end cover 3 is oval, the thickness of the wall body of described tail end cover 3 is thick type wall at the long axis direction of ellipse, moves back pricker tooth 4 and is located on the thick type wall.Its principle is: the cutting edge end 2 of bore bit main body 1 is fixed with carbide-tipped cutter bit, be circular in the middle of the bore bit main body 1, diameter is slightly less than the cutting edge length of cutting edge end 2, in the rock drilling process landwaste from peripheral clearance with the wind or water discharge, the tail end cover 2 of bore bit main body 1 is the easiest position of being blocked by landwaste with the joint portion of drill steel.Though the flank blade that prior art is set up can be brought into play the effect of the landwaste of broken obstruction place, its structure causes the tail end structure easily to be broken.The utility model is set up moves back pricker tooth 4, is located on the wall body of thick type wall of tail end cover 3, and it welds fastening firm and solid, and force structure is reasonable, can not cause tail end cover 3 to break.Pull out pricker when operation, move back the landwaste that pricker tooth 4 can broken obstruction place, bore bit is taken out in smoothly dredging boring.Because its cylindrical is oval, the inner circle size constancy.Oval short-axis direction is non-thickening position, herein and the gap that forms between petrosal foramen ensured and the smooth eliminating of landwaste further strengthened the anti-sticking function.

Such as Fig. 1, Fig. 3, shown in Figure 4, a kind of improvement is, described cutting edge end 2 is yi word pattern blades, and the long axis direction of described ellipse is consistent with the cutting edge bearing of trend of yi word pattern blade, the little 2mm of length of the cutting edge of the described yi word pattern blade of the Length Ratio of the major axis of described ellipse.

Such as Fig. 3, shown in Figure 5, the another kind of improvement is that the crown section of described cutting edge end 2 is located at a pair of sharp mouth breach 5 of strengthening sharpness.This structure can strengthen the sharpness of the crown of cutting edge end 2, improves the rock drilling operating efficiency.

With the equivalent transformation of the similar homogeneous structure of utility model, all fall into protection domain of the present utility model.

Claims

1. the improvement structure of a bore bit, comprise the bore bit main body, described bore bit main body is provided with cutting edge end and tail end cover, it is characterized in that: also comprise and move back the pricker tooth on the wall body of being located at tail end cover, the described pricker tooth that moves back is Hardmetal materials, moves back in the embedded breach that matches that is welded in tail end cover correspondence position of pricker tooth, and the cylindrical of the wall body of described tail end cover is oval, the thickness of the wall body of described tail end cover is thick type wall at the long axis direction of ellipse, moves back the pricker tooth and is located on the thick type wall.

2. the improvement structure of a kind of bore bit according to claim 1, it is characterized in that: described cutting edge end is the yi word pattern blade, the long axis direction of described ellipse is consistent with the cutting edge bearing of trend of yi word pattern blade, the little 2mm of length of the cutting edge of the described yi word pattern blade of the Length Ratio of the major axis of described ellipse.

3. the improvement structure of a kind of bore bit according to claim 2, it is characterized in that: the crown section of described cutting edge end is located at a pair of sharp mouth breach of strengthening sharpness.