CN2070813U

CN2070813U - Division detachable in hole drill bit for stud wheel

Info

Publication number: CN2070813U
Application number: CN 90211244
Authority: CN
Inventors: 晏汉章; 王克春
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-03-10
Filing date: 1990-03-10
Publication date: 1991-02-06

Abstract

The utility model relates to a novel down-hole drill bit, matching with the impactor of a down-hole drill bit. The utility model is characterized in that the drill bit has less steel material consumption and low cost; because the head of the drill bit can be dismounted and replaced after abrasion, the back of the drill bit can play the effect on prolonging the service life and saving the steel materials. The utility model can replace the whole type column teeth down-hole drill bits with various specifications and models.

Description

Split detachable post tooth down-the-hold drill bit

The utility model relates to the drilling tool of mining, specifically is meant a kind of split detachable post tooth down-the-hold drill bit.

Down-the-hole drill is one of drilling machine of widely using of current mining, and with the down-the-hold drill bit that the impactor assembly of down-the-hole drill is used, then adopt the hard alloy columnar teeth down-the-hold drill bit in a large number.The form of structure of all post tooth down-the-hold drill bit series in scheming at present, all belong to whole forging and pressing formula, its manufacturing process is complicated, and required steel consumption amount is big, reduces the potentiality of machine cost and has dug to the greatest extent, cost is difficult to continue to descend, and this solid drill in use, because the work plane of drill bit head and the wearing and tearing of hard alloy columnar teeth, the solid drill that can cause comprising intact drill bit afterbody is scrapped, cause steel to waste greatly, the also corresponding cost that improves mining.

Therefore, the purpose of this utility model, provide a kind of that fit together use after drill bit head and drill bit portion system are made and can dismantle the hard alloy columnar teeth down-the-hold drill bit that comes, make that its used steel consumption amount is little, and make prolong and the saving steel application life of drill bit afterbody.

Below in conjunction with drawings and Examples the utility model is described in detail.

Fig. 1 is the forward sectional view of a kind of concrete structure of the present utility model;

Fig. 2 is fitted in the forward sectional view that uses for the utility model with the impactor of down-the-hole drill.

Referring to Fig. 1, this new drill comprises drill bit head (2) and drill bit afterbody (5), anterior complete structure at drill bit head (2) according to existing solid drill head, several hard alloy columnar teeths (1) are housed, and the sludge groove (7) that has hole, air channel (6) and be connected with hole, air channel (6), rear portion in drill bit head (2) has an endoporus along axis and is connected with hole, air channel (6).The front portion of drill bit afterbody (5) enters the endoporus at drill bit head (2) rear portion and is connected with drill bit head (2), its ways of connecting can be multiple, being threaded as employing, promptly is to be processed with the suitable screw thread that screws in the endoporus at the front portion of drill bit afterbody (5) and drill bit head (2) rear portion.For making convenient disassembly, this being threaded of drill bit head (2) and drill bit afterbody (5) adopted special thread and coarse pitch.Drill bit afterbody (5) inside is processed with axial hole, air channel (4) and is connected with the hole, air channel (6) of drill bit head (2).A dust ring (3) that is linked on the drill bit afterbody (5) is close in rear end in drill bit head (2).The dependence screw thread is screwed in drill bit head (2) and drill bit afterbody (5) together, the split rip bit that they are formed, still structure and the effect with existing solid drill is identical with effect for its overall structure, thereby can replace existing solid drill fully and be fitted in use with the impactor of down-the-hole drill, its piercing efficiency is all identical with domestic existing solid drill with application life.Before the work, the splined section of drill bit afterbody (5) is inserted in the bit freezing cover (9) of impactor (8) shown in Figure 2, used round key (11) to pin again, drill bit head (2) connects through self screw thread and drill bit afterbody (5), gets final product work.In Fig. 2, the Reference numeral of not addressed of relevant impactor (8) is: 11, and outer shell; 12, piston; 13.Lining.

Drill bit head that the utility model drill bit will wear and tear easily (2) and nonabradable drill bit afterbody (5) split manufacturing then are used in combination, owing to unlike existing solid drill, need forge and press manufacturing, thereby saved rolled steel dosage and forging expense, can reduce cost significantly.Simultaneously since the drill bit head (2) of wearing and tearing dismounting and change easily easily reach a drill bit afterbody (5) and be used a plurality of drill bit heads (2).This just accomplishes to make the best use of everything, and has fully prolonged the application life of drill bit afterbody (5), thereby is that country saves a large amount of steel, has also reduced the cost of mining.This split type process of drill bit manufacture tube just.Be beneficial to production in enormous quantities.The all available the utility model drill bit of monolithic post tooth down-the-hold drill bit (bit diameter φ 85-278 millimeter is various) of existing all size model replaces.

Claims

1, a kind of split detachable post tooth down-the-hold drill bit that uses with the impactor assembly of down-the-hole drill, it is characterized in that, it comprises drill bit head (2) and drill bit afterbody (5), in the front portion of drill bit head (2) several hard alloy columnar teeths (1) are housed, and the sludge groove (7) that has hole, air channel (6) and be connected with hole, air channel (6), rear portion in bit head (2), having an endoporus along axis is connected with hole, air channel (6), the front portion of drill bit afterbody (5) enters the endoporus at drill bit head (2) rear portion and is threaded mutually with drill bit head (2), drill bit afterbody (5) inside is processed with axial hole, air channel (4) and is connected with the hole, air channel (6) of drill bit head (2), a dust ring (3) that is linked in the drill bit usefulness portion (5) is close in rear end in drill bit head (2).