Background technique
Nut is as a kind of fastening piece and link, use ten/extensively, common and bolt is used, at the Chinese patent notification number is CN2050901U, name is called in the patent documentation of " half nut " and discloses a kind of nut, its screw thread is connected as a single entity, an end that is connected with connected parts at nut is provided with one section unthreaded hole coaxial with tapped hole, and on unthreaded hole, have a tank filler sleeve with the nut external communications, following deficiency during using, the nut of this patent is arranged: if the screw thread of self or the bolt that is used with it gets rusty or when impurity is arranged, then dismounting difficulty, easy stripped thread, though can in unthreaded hole, refuel by tank filler sleeve, but it is good lubricated that lubricant oil can not carry out thread, and self-locking property is bad, when especially being used for being used with the vehicle front axle, in order to reach enough coupling mechanism forces, can be fine thread with screw thread design, the easier generation of stripped thread phenomenon causes scrapping of nut and wheel axle.
Summary of the invention
The utility model is difficult for the set screw nut of stripped thread when a kind of dismounting is provided, solved existing nut the stripped thread problem that foreign material caused such as iron rust and problem of oily inconvenience when being used with bolt.
Above technical problem solves by following technical proposal: a kind of set screw nut, comprise nut body, described nut body comprises the tapped hole section, the hole wall of described tapped hole section is provided with multifunctional groove, described multifunctional groove extends axially along described tapped hole section, and described multifunctional groove runs through described tapped hole section." tapped hole section " is meant that nut body is provided with that section of screw thread, by on the threaded walls of the tapped hole section of set screw nut, offering multifunctional groove, and multifunctional groove runs through whole tapped hole section, if screw thread gets rusty or foreign material is arranged, so in turning the process of nut, foreign material such as rust can be squeezed in the multifunctional groove, and can be not stuck between the screw thread of nut and bolt, influence screw thread according to normal orbiting motion, thereby cause the phenomenon of stripped thread to take place, before twisting connected nut, can in multifunctional groove, drip some lubricant oil, when nut twist receive on the bolt after, unnecessary lubricant oil can be stored in the multifunctional groove, play the function of pcrmanent lubrication, get rusty with regard to the long rear thread of evaluation time, but as long as stagger some positions between screw thread slightly, the lubricant oil that is stored in the multifunctional groove can be lubricated by double thread again, screw thread can be turned on easily, be unlikely to stripped thread, because of design multifunctional groove arranged simultaneously, destroyed the continuity of screw thread, nut also is difficult for becoming flexible like this, and locking function can be stronger.
As preferably, described multifunctional groove has three, is evenly distributed on the hole wall of described tapped hole section.When screw thread get rusty or its on when foreign material are arranged, only needing that less angle of nut rotation promptly is not more than 60 degree just can be discharged to foreign material such as rust in the multifunctional groove, if uneven distribution, the angle that foreign material is discharged to required rotation in the multifunctional groove can be bigger than the angle that even distribution will be rotated, it is equally distributed good that yet promptly anti-stripped thread function does not have, if the quantity of multifunctional groove is opened too much, can make the locking function of nut, general 3 to 4 proper.
As preferably, the cross section of described multifunctional groove is a triangle or trapezoidal.When nut was screwed on the bolt, the Line of contact of the screw thread on multifunctional groove and the bolt was an oblique line, and during rotation, striking off of rust on the edge double thread of multifunctional groove and foreign material is effective, made more to be difficult for stripped thread between nut and the bolt.
As preferably, described nut body outer surface axially is provided with the boot section successively, the operation area, and the locking area, described boot section, operation area, locking area three's cross-section area becomes greatly successively, and described operation area is positive hexagonal prism.Hexagon is more general, does not need special tool(s) just can twist this set screw nut and connects operation.
As preferably, described boot section is a tack spherical crown shape, and the big bottom surface of described boot section links to each other with described operation area, and the diameter of described big bottom surface is identical with the inscribe diameter of a circle of the cross section of described operation area." big bottom surface " is meant that bigger bottom surface of diameter of boot section, in the time of in nut is used in small space, generally be to remove nutting with plum blossom shaped spanner or socket wrench, and eyes can not see whether aiming at, and this moment, this boot section can make spanner be easier to snap on the operation area of this set screw nut this set screw nut is carried out operation.
As preferably, described locking area is a cylindrical body, and described cylindrical diameter is greater than the external diameter of a circle of the cross section of described operation area.Design set screw nut and the surface of contact that is connected thing bigger, be not easy like this to unclamp, be designed to circular advantage and be easy processing, the area maximum of circle when the radius of gyration is identical.
As preferably, the screw thread of described tapped hole section is a fine thread.The locking effect of fine thread is good.
The utlity model has following advantage, by on the screw thread of set screw nut, offering multifunctional groove, the foreign material such as rust that the edge of multifunctional groove can will match with set screw nut on the screw thread of the fastening piece that uses scrape, and be contained in the multifunctional groove, simultaneously can also when assembling nut, in multifunctional groove, store lubricant oil, double thread plays lubrication when turning screw thread, make and be difficult for producing the stripped thread phenomenon when this set screw nut uses, only on original nut, offer several multifunctional grooves and get final product the fabricating cost model utility, so make easily, simple in structure, fabricating cost is low, and versatility is good.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further described.
Referring to Fig. 1, a kind of set screw nut, comprise nut body 1, on the hole wall of the tapped hole section on the nut body 1, be provided with three multifunctional grooves 2, multifunctional groove 2 extends axially along the tapped hole section, multifunctional groove 2 runs through whole tapped hole section, multifunctional groove 2 is evenly distributed on the hole wall of tapped hole section, be that angle between the multifunctional groove 2 is 120 degree, the screw thread of tapped hole section is a fine thread, multifunctional groove 2 is " V " type groove in the present embodiment, and being designed to certainly trapezoidally also has the effect of scraping foreign material such as removing rust preferably, if be designed to rectangle then poor effect.
Referring to Fig. 2, the outer surface of nut body axially is provided with boot section 3 from the top down successively, operation area 4, locking area 5, boot section 3, operation area 4, locking area 5 threes' cross-section area becomes big successively, the locking area 5 that is located at the lower end is 21 millimeters cylindrical body for diameter, cylindrical length is 6 millimeters, cylindrical lower end surface is a plane, cylindrical lower end surface and side are arc transition, and the radius of circular arc is 0.2 millimeter, and the upper end of locking area 5 is connected with the operation area 4 of integrative-structure, locking area 5 is the conical surface transition with operation area 4, the angle of the upper-end surface of conical surface and locking area 5 is 20 degree, and operation area 4 is positive hexagonal prism, and the height of hexagonal prism is 5.5 millimeters, the distance of two relative sides of hexagonal prism is 15 millimeters, the upper-end surface of operation area 4 is connected with the boot section 3 of integrative-structure, and boot section 3 is a tack spherical crown shape, and the height of boot section 3 is 2.5 millimeters, the diameter of the lower end surface of boot section 3 is 15 millimeters, and the diameter of the upper-end surface of boot section 3 is 10 millimeters.
During use, in order to take off next time conveniently, on the inwall of the tapped hole section of nut body 1, coat a spot of lubricant oil, unnecessary lubricant oil can be scraped in the multifunctional groove 2, then the lubricant oil that herein stores can play good lubrication by double thread when taking off this set screw nut next time, makes that anti-stripped thread effect can be better.