CN207363602U

CN207363602U - Seal rock bit

Info

Publication number: CN207363602U
Application number: CN201721450922.8U
Authority: CN
Inventors: 吴世友
Original assignee: SUZHOU DANV TOOLS Co Ltd
Current assignee: SUZHOU DANV TOOLS Co Ltd
Priority date: 2017-11-03
Filing date: 2017-11-03
Publication date: 2018-05-15
Anticipated expiration: 2027-11-03

Abstract

The utility model provides a kind of sealing rock bit, it includes：Bit leg and the gear wheel being arranged on the bit leg journel of the bit leg；Dustband and rubber seal are additionally provided between the gear wheel and the bit leg journel, inlet channel and outlet passageway are provided with the bit leg, the air admission hole of the inlet channel is extended in the annular space that the bit leg, gear wheel, dustband and rubber seal are surrounded, the venthole of described outlet passageway one end is extended in the annular space, the other end is communicated with the external world, and the air admission hole, annular space, venthole form the passage of cooling gas.Rubber seal inside the sealing rock bit of the utility model can obtain the cooling of compressed air, be effectively prevented from the high temperature ageing of sealing ring, and newly-increased dustband can effectively prevent landwaste and enter bearing wear sealing ring, extend the service life of sealing ring.

Description

Seal rock bit

Technical field

It the utility model is related to a kind of mechanical drilling drilling tool, more particularly to a kind of sealing rock bit.

Background technology

Sealing rock bit be it is a kind of apply very extensive exploitation drilling tool, in its drilling process, in the pressure of the drill and moment of torsion Under effect, by the revolution of its gear wheel and rock is rolled for rotation and impact grinding, achievees the purpose that to destroy rock stratum.For reality The sealing inside rock bit is now sealed, prevents bearing bore lubricating grease from leaking outside, seal rock bit is internally provided with sealing ring. However, when sealing rock bit work, gear wheel can rotate at a high speed, and the high temperature of generation can cause the aging of sealing ring, Jin Erying Ring the service life of sealing ring.

Therefore, in view of the above-mentioned problems, being necessary to propose further solution.

Utility model content

The purpose of this utility model is to provide one kind to seal rock bit, to overcome the deficiencies in the prior art.

To realize above-mentioned purpose of utility model, the utility model provides a kind of sealing rock bit, it includes：Bit leg and set The gear wheel being placed on the bit leg journel of the bit leg；

Dustband and rubber seal are additionally provided between the gear wheel and the bit leg journel, is provided with the bit leg Inlet channel and outlet passageway, the air admission hole of the inlet channel extend to the bit leg, gear wheel, dustband and rubber seal In the annular space surrounded, the venthole of described outlet passageway one end is extended in the annular space, the other end and the external world Communicate, the air admission hole, annular space, venthole form the passage of cooling gas.

As the improvement of the sealing rock bit of the utility model, the air admission hole and venthole are located at the bit leg journel Both sides.

As the improvement of the sealing rock bit of the utility model, end that the gear wheel and the bit leg journel are oppositely arranged Annular groove is offered on face, the dustband is provided with the annular groove.

As the improvement of the sealing rock bit of the utility model, the cross sectional shape of the annular groove is rectangle.

As the improvement of the sealing rock bit of the utility model, the dustband draws dustband for Kev.

Compared with prior art, the beneficial effects of the utility model are：Inside the sealing rock bit of the utility model Rubber seal can obtain the cooling of compressed air, be effectively prevented from the high temperature ageing of sealing ring, and newly-increased dustband energy Effectively prevent landwaste from entering bearing wear sealing ring, extend the service life of sealing ring.

Brief description of the drawings

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, drawings in the following description are only It is some embodiments described in the utility model, for those of ordinary skill in the art, is not making the creative labor On the premise of, other attached drawings can also be obtained according to these attached drawings.

Fig. 1 is the schematic perspective view of an embodiment of the sealing rock bit of the utility model；

Fig. 2 is the profile of an embodiment of the sealing rock bit of the utility model.

Embodiment

The utility model is described in detail in shown each embodiment below in conjunction with the accompanying drawings, but it should explanation, These embodiments are not limitation of the utility model, and those of ordinary skill in the art are according to these embodiment institute works Energy, method or equivalent transformation or replacement in structure, belong within the scope of protection of the utility model.

As shown in Figure 1, 2, the sealing rock bit of the utility model includes：Bit leg 1, be arranged at the bit leg 1 one Gear wheel 3 on the bit leg journel 2 at end, be arranged between the gear wheel 3 and the bit leg journel 2 and be additionally provided with dustband 5 and rubber Glue sealing ring 4.Wherein, the quantity of the gear wheel 3 is three, so that, the rock bit is sealing tricone bit.

In order to realize the sealing between the gear wheel 3 and bit leg journel 2, between the gear wheel 3 and the bit leg journel 2 also Rubber seal 4 is provided with, which is contained in the annular space between the gear wheel 3 and bit leg journel 2.

In order to be cooled down to the rubber seal 4, prevent that it from occurring aging under high temperature action, in the bit leg 1 It is provided with inlet channel and outlet passageway.Wherein, the air admission hole 11 of the inlet channel extends to the bit leg 1, gear wheel 3, prevents In the annular space that konisphere 5 and rubber seal 4 are surrounded, the venthole 12 of one end of the outlet passageway extends to the ring In shape space, the other end is communicated with the external world.The air admission hole 11, annular space and venthole 12 form the passage of cooling gas.

So as to which the cooling gas that compressed air provides is entered in annular space by air admission hole, and rubber seal is carried out Cool.Preferably, the air admission hole 11 and venthole 12 are located at 2 both sides of bit leg journel, at this time, into annular space Cooling gas divide two-way come together at venthole discharge.

In addition, small crushed stone and dust enter in annular space in order to prevent, rubber seal is caused to wear.The gear wheel 3 Annular groove is offered on the end face being oppositely arranged with the bit leg journel 2, the dustband 5 is provided with the annular groove. In one embodiment, the cross sectional shape of the annular groove is rectangle.The dustband 5 draws dustband for Kev, which draws Dustband has density low, and intensity is high, and good toughness, high temperature resistant, can play the dust-proof effect of good pushing off the slag.

In conclusion the rubber seal inside the sealing rock bit of the utility model can obtain the cold of compressed air But, the high temperature ageing of sealing ring is effectively prevented from, and newly-increased dustband can effectively prevent landwaste and enter bearing wear sealing ring, Extend the service life of sealing ring.

It is obvious to a person skilled in the art that the utility model is not limited to the details of above-mentioned one exemplary embodiment, and And in the case of the spirit or essential attributes without departing substantially from the utility model, it can realize that this practicality is new in other specific forms Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this practicality is new The scope of type is indicated by the appended claims rather than the foregoing description, it is intended that the equivalency fallen in claim is contained All changes in justice and scope are embraced therein.Any reference numeral in claim should not be considered as limitation Involved claim.

Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped Containing an independent technical solution, this narrating mode of specification is only that those skilled in the art should for clarity Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art It is appreciated that other embodiment.

Claims

1. one kind sealing rock bit, it is characterised in that the sealing rock bit includes：Bit leg and it is arranged at the bit leg Gear wheel on bit leg journel；

Dustband and rubber seal are additionally provided between the gear wheel and the bit leg journel, air inlet is provided with the bit leg Passage and outlet passageway, the air admission hole of the inlet channel extend to the bit leg, gear wheel, dustband and rubber seal and are enclosed Into annular space in, the venthole of described outlet passageway one end is extended in the annular space, and the other end is communicated with the external world, The air admission hole, annular space, venthole form the passage of cooling gas.

2. sealing rock bit according to claim 1, it is characterised in that the air admission hole and venthole are located at the tooth Slap axle journal both sides.

3. sealing rock bit according to claim 1, it is characterised in that the gear wheel is opposite with the bit leg journel to be set Annular groove is offered on the end face put, the dustband is provided with the annular groove.

4. sealing rock bit according to claim 3, it is characterised in that the cross sectional shape of the annular groove is rectangle.

5. sealing rock bit according to claim 1, it is characterised in that the dustband draws dustband for Kev.