CN2526493Y

CN2526493Y - High-precision positioning screw jointing structure for rock bit

Info

Publication number: CN2526493Y
Application number: CN 02221318
Authority: CN
Inventors: 陈道中
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-01-15
Filing date: 2002-01-15
Publication date: 2002-12-18
Anticipated expiration: 2012-01-15

Abstract

A rock drilling tool high-precision positioning thread connecting mechanism comprises a rod male thread component and a sleeve female thread component. The utility model is characterized in that a positioning column 3 is arranged between an external thread section 1 and a rod body 5 of the rod male thread component; the front part of an internal thread section 2 of the sleeve female thread component is provided with a positioning sleeve 4. The utility model improves the positioning precision of a connecting part, thus reducing the attached stress acted on the part when working and prolonging the service life of the thread connecting tool; meanwhile, the utility model can reduce the deflection caused by the looseness of the thread when the tool working, ensures the straightness of drilling bores, and improves the engineering quality. The utility model has the advantages of simple and practical structure, easy production, improving the service life of the tool and improving the engineering quality of the drilling bores. The utility model is suitable for thread connecting jackrods, drillmobile jackrods, bit shanks, connecting sleeves, thread connecting bore bits, and other tools requiring adopting thread connections, and is also suitable for similar thread connecting components in other mechanisms.

Description

Drill rod hi-Fix screw connection structure

The utility model relates to the rock drilling drilling tool, the syndeton of the drilling tool that particularly is threaded.

Existing threaded connection drilling tool, owing to will satisfy the loading and unloading requirement that drilling tool uses, its threaded engagement tolerance is bigger, adds the imperfection of the lack of standardization and detection means of some manufacturing process, it is bigger that the real size of screw thread departs from standard-required.This loosening being threaded, when making drill rod work, be subjected to the effect of many subsidiary stresses at connecting portion, make original because the screw thread position that geometrical variations just exists stress to concentrate, its force-bearing situation is complicated more, abominable, often cause drilling tool screw thread and escape position premature failure to lose efficacy, had a strong impact on the application life of drilling tool.In addition, loosening is threaded, and makes the glacing flatness of drill rod boring be subjected to very big influence.

The purpose of this utility model is: a kind of drill rod hi-Fix screw connection structure is provided.It had both improved the positioning accuracy of connecting portion, thereby suffered subsidiary stress when cutting down the work of this position prolongs application life of the drilling tool that is threaded; Because the glacing flatness that rock drilling is holed is guaranteed in the skew that thread looseness causes, improve workmanship in the time of can reducing simultaneously drilling tool work again.

The utility model is achieved in that drill rod hi-Fix screw connection structure, and it comprises rod member class pin members and sleeve class female threaded member; It is characterized in that: between the external thread section (1) of rod member class pin members and rod member body (5), be provided with a reference column (3); Front portion in the internal thread segment (2) of sleeve class female threaded member is provided with a positioning sleeve (4).

In the above-mentioned drill rod hi-Fix screw connection structure, described reference column (3) can be cylinder or cone; Described positioning sleeve (4) can be cylindrical sleeve or tapered sleeve.

Compare with existing screw connection structure, the utility model has increased location structure in the junction, the existence of this location structure can reduce because the radial deflection that thread looseness brings, thereby cut down because all multifactor subsidiary stresses that brings the screw thread position such as drill steel bending, deadweight, misoperation and rock texture differences, for the drilling tool that is fractured into main failure characteristics with the screw thread position, the improvement of screw thread position stress condition will help the drilling tool raising in application life undoubtedly; Simultaneously, the existence of location structure has reduced the horizontal looseness of drilling tool connecting portion, has guaranteed the glacing flatness of rock drilling boring, has improved the workmanship of punchinging, and has also further improved the stress of whole drilling tool work system; And, reduced the wearing and tearing of screw thread because location structure has been arranged, prolonged the application life of drilling tool from another angle.The utlity model has simple and practically, be easy to produce, can improve drilling tool application life, can improve the characteristics of the workmanship of punchinging.Other drilling tools that are applicable to screw connection drill rod, drill carriage drill steel, bit shank, adapter sleeve, are threaded bore bit and need employing to be threaded also are applicable to similar screw connection member in other machineries.

Below in conjunction with accompanying drawing the specific embodiment of the present utility model is described in further detail.

Accompanying drawing 1 is a structural representation of the present utility model;

Embodiment: as shown in Figure 1, drill rod hi-Fix screw connection structure comprises existing rod member class pin members and sleeve class female threaded member; Improvements are, are provided with a reference column 3 between the external thread section 1 of rod member class pin members and rod member body 5; Be provided with a positioning sleeve 4 corresponding with reference column 3 in the front portion of the internal thread segment 2 of sleeve class female threaded member.When the external thread section 1 of the rod member class pin members among Fig. 1 screws in the internal thread segment 2 of sleeve class female threaded member, reference column 3 follow-ups are inserted in the positioning sleeve 4, because reference column 3 is non-threaded structure with positioning sleeve 4, easy to process, inspection specification, can do not influence screw thread easy to loading and unloading in, improve its quality of fit greatly, thereby reduced the radial deflection of screw thread, guaranteed the raising of connecting portion axiality.The screw thread of external thread section 1 and internal thread segment 2 can be corrugated thread, trapezoidal thread, compound thread or other shape screw threads; Reference column 3 can be respectively cylinder and cylindrical sleeve with the shape of positioning sleeve 4, also can be cone and tapered sleeve; Reference column 3 should be higher than the threaded engagement precision with the quality of fit of positioning sleeve 4.

Claims

1, drill rod hi-Fix screw connection structure, it comprises rod member class pin members and sleeve class female threaded member; It is characterized in that: between the external thread section (1) of rod member class pin members and rod member body (5), be provided with a reference column (3); Front portion in the internal thread segment (2) of sleeve class female threaded member is provided with a positioning sleeve (4).

2, drill rod hi-Fix screw connection structure according to claim 1, it is characterized in that: described reference column (3) is cylinder or cone; Described positioning sleeve (4) is cylindrical sleeve or tapered sleeve.