CN201372732Y

CN201372732Y - Drill bit

Info

Publication number: CN201372732Y
Application number: CN200920052634U
Authority: CN
Inventors: 伍利钱
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-03-16
Filing date: 2009-03-16
Publication date: 2009-12-30
Anticipated expiration: 2019-03-16

Abstract

The utility model discloses a drill bit, which comprises a drill bushing, a drill bushing ring sleeved outside the drill bushing, and a central drill bit rotationally matched and connected with the drill bushing to form a whole. The inner surface of the drill bushing is provided with a plurality of lugs, the part where the central drill bit is rotationally matched and connected with the drill bushing is provided with a plurality of through grooves, and the adjacent position of the through grooves is provided with a plurality of grooves; the lugs of the drill bushing are screwed into the grooves along the through grooves; and the match connection of the lugs and the grooves realizes the match connection of the central drill bit and the drill bushing. The drill bit of the utility model can be sleeved with an iron pipe to be used together, has the advantages of simple structure, convenient use and durability, and can be widely applied in various drilling equipment which work by the combination of impact and rotation or only by rotation.

Description

Drill

Technical field

The utility model relates to a kind of drill, should particularly relate to a kind of simple in structure, easy to use, and can realize the drill that snap lock is connected between drill bit and drill bushing, it can be applicable to impact and to rotate the drilling equipment that combines or only work with rotation.

Background technology

When carrying out bottom boring,, cave in the mud boulder that prevents borehole sidewall because the requirement of geological conditions will be provided with iron pipe sometimes outside drill bit.Usually iron pipe will be advanced to the depths, stratum under the drive of drill bit together, so the drill bit of band iron pipe adopts the drill bit with the related iron pipe function of boring usually, that is to say and have the function that hole that main drill bit is got out is expanded, can in iron pipe, extract out in order to make drill bit, existing boring band iron pipe drill bit has several forms, but the great majority design is complicated, and cost is high, need high-tech welder welding when drill bushing and iron pipe welding, maintenance vertically reduces the friction between iron pipe and the stratum.

Summary of the invention

The purpose of this utility model is, overcomes the defective that the related iron pipe drill bit of existing boring exists, and a kind of drill of new structure is provided, and technical problem to be solved is to make it simple in structure, easy to use and durable in use.

The purpose of this utility model and to solve its technical problem be to adopt following technical scheme to realize.According to a kind of drill that the utility model proposes, comprise drill bushing, be enclosed within the drill bushing ring of drill bushing outside and be connected and be the center bit of one with the drill bushing rotation, the inner surface of described drill bushing is provided with a plurality of projections, the position that described center bit and the rotation of described drill bushing are connected is provided with a plurality of grooves that run through, and is provided with a plurality of grooves in the described groove position adjacent that runs through; The projection of drill bushing screws in groove along running through groove, and being connected of described projection and groove realizes being connected of center bit and drill bushing.

The purpose of this utility model and solve its technical problem and can also be able to be further achieved by the following technical measures.

According to the drill of the utility model embodiment, wherein said drill bushing ring is an elastic structure, has a plurality of longitudinal openings, and its external surface is provided with screw thread, and its outward flange is provided with a plurality of breach, and the internal diameter of this drill bushing ring is not more than the external diameter of drill bushing.

According to the drill of the utility model embodiment, the external surface of wherein said drill bushing ring is provided with screw thread, and the ridge of outer iron pipe inner surface is connected with being arranged on described drill.

According to the drill of the utility model embodiment, the wherein said depth ratio groove that runs through groove is dark.

According to the drill of the utility model embodiment, wherein said projection, run through the square or rectangle of being shaped as of groove and groove.

By technique scheme, the advantage that drill of the present utility model has is: this drill at work, the operative end surface that impact force can be from the direct transfers in drill bit top to the bottom, the power slippages is little, the efficient height; Be used for doing between the center bit of hole enlargement and the drill bushing the single radial motion related iron pipe function that can realize holing, component wear is little, long service life; And each position is stressed evenly rationally, the capable drill bushing profile of gear makes the reaming work area big, drill bit than the related iron pipe of boring of similar shape when detaching iron pipe is easily convenient, more can continue driving rock stratum downwards finishing once under the situation that the driving back oppositely do not having drill sleeve iron pipe system.

Above-mentioned explanation only is the general introduction of technical solutions of the utility model, for can clearer understanding technological means of the present utility model, and can be implemented according to the content of manual, and for above-mentioned and other purposes, feature and advantage of the present utility model can be become apparent, below especially exemplified by preferred embodiment, and conjunction with figs., be described in detail as follows.

Description of drawings

Fig. 1 is the three-dimensional decomposition texture schematic diagram of the utility model drill.

Fig. 2 is that the A of the utility model drill is to structural representation.

Fig. 3 is the drill bit of the utility model drill, the Pou Mian Knot structure schematic diagram that drill bushing cooperates with iron pipe.

10: drill bushing

11: projection

20: the drill bushing ring

21: screw thread

22: opening

23: breach

30: center bit

31: run through groove

32: groove

40: iron pipe

41: ridge

The specific embodiment

For further setting forth the utility model is to reach technological means and the effect that predetermined goal of the invention is taked, below in conjunction with accompanying drawing and preferred embodiment, to according to its specific embodiment of drill, structure, feature and the effect thereof that the utility model proposes, describe in detail as after.

See also shown in Fig. 1 and 2, drill of the present utility model comprises: drill bushing 10, be enclosed within the drill bushing ring 20 of drill bushing 10 external surfaces and be connected with drill bushing 10 rotation and be the center bit 30 of one.Described drill bushing ring 20 is an elastic structure, has a longitudinal opening 22, and its external surface is provided with anticlockwise screw thread 21, and its outward flange is provided with a breach 23.The internal diameter of this drill bushing ring 20 is not more than the external diameter of drill bushing 10, utilize manpower that the opening 22 of drill bushing ring 20 is opened, drill bushing ring 20 just is enclosed within on the drill bushing 10, and elastic shrinkage effect because of drill bushing ring 20, tightly be enclosed within the external surface of drill bushing 10, be connected with anticlockwise ridge 41 on the iron pipe 40.

The inner surface of described drill bushing 10 is provided with a plurality of projections 11, and described center bit 30 is provided with a plurality of grooves 31 that run through with the position that described drill bushing 10 rotations are connected, and is provided with a plurality of grooves 32 in described groove 31 position adjacent that run through; The projection 11 of drill bushing 10 screws in groove 32 along running through groove 31, and described projection 11 is realized being connected of center bit 30 and drill bushing 10 with being connected of groove 32.Can will run through the depth design of groove 31 according to actual needs for darker than the degree of depth of groove 32; The external surface of the projection 11 of drill bushing 10, the position that is connected with drill bushing 10 rotation is provided with run through groove 31 and groove 32 be shaped as square or rectangle.

The operating principle of drill of the present utility model is: as shown in Figure 3, drill of the present utility model can be connected with iron pipe 40, this iron pipe 40 is to be threaded with drill bushing ring 20, and at breach 23 places of drill bushing ring 20, is fastenedly connected with bolt or other securing members and tube connector 40.When center drill bit 30 is rotated in the forward, 32 of a plurality of grooves on a plurality of projections 11 on the inner hole wall of drill bushing 10 and center bit 30 external surfaces cooperate installation, promote center bit 30 and drill bushing 10 and rotate together, reaming is carried out in the boring of center bit 30.In the boring procedure, center bit 30 is radially withdrawn and is resetted, and reduced can break away from from the logical placement of foot of iron pipe (tube connector) 40, extracts drill bit out and finishes this program, or oppositely continue driving rock stratum downwards under the situation that does not have drill sleeve iron pipe system.

The above, it only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, though the utility model discloses as above with preferred embodiment, yet be not in order to limit the utility model, any those skilled in the art are not in breaking away from the technical solutions of the utility model scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solutions of the utility model, according to technical spirit of the present utility model to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solutions of the utility model.

Claims

1, a kind of drill, comprise drill bushing, be enclosed within the drill bushing ring of drill bushing outside and be connected and be the center bit of one with the drill bushing rotation, it is characterized in that: the inner surface of described drill bushing is provided with a plurality of projections, the position that described center bit and the rotation of described drill bushing are connected is provided with a plurality of grooves that run through, and is provided with a plurality of grooves in the described groove position adjacent that runs through; The projection of drill bushing screws in groove along running through groove, and being connected of described projection and groove realizes being connected of center bit and drill bushing.

2, drill according to claim 1 is characterized in that: described drill bushing ring is an elastic structure, has a plurality of longitudinal openings, and its outward flange is provided with a plurality of breach, and the internal diameter of this drill bushing ring is not more than the external diameter of described drill bushing.

3, drill according to claim 2 is characterized in that: the external surface of described drill bushing ring is provided with screw thread, and the ridge of outer iron pipe inner surface is connected with being arranged on described drill.

4, drill according to claim 1 is characterized in that: the described depth ratio groove that runs through groove is dark.

5, drill according to claim 1 is characterized in that: described projection, run through the square or rectangle of being shaped as of groove and groove.