A kind of bolt protective cover
Technical field
The utility model is related to a kind of bolt protective cover, particularly one kind and is enclosed on nuts and bolt end, prevent nut and
Bolt corrosion nut protective cover.
Background technology
Bolt is widely used in various Static Equipments, railway, bridge, shield tunnel, building as a kind of conventional connector
Deng field.Bolt is to be connected through a screw thread to form fastener with screw rod and nut, and nut is slightly stretched out in the end of usual screw rod.Nut
Lower section be additionally provided with pad.In use, bolt is typically exposed in environment, by air, sleet and corrosive substance
Corrosion, that is, reduce service life may bring safety problem to production and living traffic again, simultaneously because get rusty cause nut with
Screw rod becomes rusty together, it is not easy to dismantle, and brings constant to maintenance and replacing.
In order to prevent screw rod together with nut corrosion, increase bolt service life, a kind of technical scheme is using stainless
Steel bolt, but cost is significantly increased.Another is that grease is smeared on bolt, although this method being capable of antirust, meeting shadow
Sound is attractive in appearance, is also easily caused grease and drops onto other related equipment or the adjacent object of pollution.Also a kind of technology is exactly to use
Bolt-protecting cap, but because used in the place that has vibrations, the occlusion property between bolt and protective cap not enough, is led after a period of time
Loose or dislocation is caused, it is also possible to bumping against equipment, means of transport or the other objects in motion when coming off.
Chinese patent(CN 205101372)A kind of bolt protective cover is disclosed, and is specifically disclosed, inside protective cover certainly
It is sequentially provided with down and accommodates the first cavity of pad, is accommodated the second cavity of nut and accommodate the 3rd chamber of screw rod end
Body;First cavity, the second cavity and the 3rd cavity head and the tail are connected;The inwall of 3rd cavity is provided with and screw rod end external screw thread
The internal thread matched somebody with somebody, makes screw rod end to be fixed on the inwall of the 3rd cavity after stretching into.
But during practice of construction, after often occurring that bolt is fixed by nut, bolt end exposes nut
Part it is smaller, it is impossible to the female thread with the 3rd inside cavities wall makes this kind of bolt protective cover into being effectively combined
Using there is huge limitation, it is unfavorable for promoting the use of.
Utility model content
The technical problems to be solved in the utility model is:In order to solve process of the existing bolt protective cover in practice of construction
In, after often occurring that bolt is fixed by nut, the part that bolt end exposes nut is smaller, it is impossible to the 3rd cavity
The female thread of madial wall is into being effectively combined, and making the use of this kind of bolt protective cover has huge limitation, is unfavorable for promoting
The problem of using, the utility model provides a kind of bolt protective cover, fixing device is split as into fixture and lid, in annular
Inner chamber lower edge be provided with it is some be easy to be fastened on the lug at nut chamfering, and form notch between adj acent tab, it is fixed
Part is enclosed on nut, the angle of nut is first passed through notch and is entered inside fixture, then lug is stuck in nut by rotation
At chamfering, formed and fixed, then fix lid with fixture, cover nut, formed protection, fundamentally solve protective cover
Using scope it is small the problem of.
The utility model solves the technical scheme that its technical problem used:A kind of bolt protective cover, including:Fixture
And lid, the fixture has an annular cavity, and the annular cavity lower edge, which has, some to be easy to be fastened on nut chamfering
There is the notch for being easy to nut to enter annular cavity, the lid is detachably set between the lug at place, the adj acent tab
Outside fixture.
Preferably, above-mentioned lug has 6.
Preferably, above-mentioned notch is V-shaped notch,
Preferably, the opening angle of above-mentioned notch is not less than 120 °.
Preferably, section of the above-mentioned lug on the section for crossing fixture center line is triangle or wedge shape.
Preferably, above-mentioned fixing piece is annular, lid and the fixture threaded connection.
Preferably, having one and the integrally formed reinforcing annular part of fixture on the outside of above-mentioned fixing piece lower edge.
Preferably, above-mentioned reinforcing annular part cross fixture center line section on section for triangle, wedge shape or
It is square.
Preferably, the madial wall of above-mentioned fixing piece annular cavity is used to prevent fixture from rotating excessively provided with some
Position limiting structure.
Preferably, above-mentioned position limiting structure is the rib for the vertical direction for being arranged on madial wall.
Preferably, the madial wall of above-mentioned fixing piece annular cavity is provided with least one non-return structure.
Preferably, above-mentioned non-return structure forms certain hyte with an adjacent position limiting structure, same positioning group is in
Notch is not provided between interior non-return structure and position limiting structure.
Preferably, above-mentioned lid also includes the convex edge for being easy to cover nut shim.
The beneficial effects of the utility model are:
(1)A kind of bolt protective cover that the utility model is provided, is split as fixture and lid, in annular by fixing device
Inner chamber lower edge be provided with it is some be easy to be fastened on the lug at nut chamfering, and form notch between adj acent tab, it is fixed
Part is enclosed on nut, the angle of nut is first passed through notch and is entered inside fixture, then lug is stuck in nut by rotation
At chamfering, formed and fixed, then fix lid with fixture, cover nut, formed protection, fundamentally solve protective cover
Using scope it is small the problem of.
(2)There is one and fixture one on the outside of a kind of bolt protective cover that the utility model is provided, fixture lower edge
The reinforcing annular part of shaping, can so effectively improve the intensity between lug and fixture, effectively prevent due to lug with
Insufficient strength between fixture and make the problem of nut-protecting sleeve comes off from nut.
(3)A kind of bolt protective cover that the utility model is provided, also with position limiting structure, makes fixture be set on nut
During rotation, prevent rotation excessive, make the angle of nut corresponding with the position of notch, so as to be come off from nut.
(4)A kind of bolt protective cover that the utility model is provided, also with non-return structure, stops and returns structure and adjacent
One position limiting structure forms certain hyte, and groove is not provided between the non-return structure and position limiting structure that are in same positioning group
Mouthful, fixture is set in when being rotated on nut, non-return structure can be crossed, so that the angle of nut is in position limiting structure and only
Return between structure, non-return structure can not cross non-return structure when fixture is reversely rotated, and finally make nut and fixation
Position between part is relatively fixed, it is therefore prevented that fixture comes off from nut.
Brief description of the drawings
The utility model is further illustrated with reference to the accompanying drawings and examples.
Fig. 1 is a kind of view sub-anatomy of bolt protective cover of the present utility model;
Fig. 2 is a kind of stereogram of the fixture of bolt protective cover of the present utility model;
Fig. 3 is a kind of stereogram of the lid of bolt protective cover of the present utility model;
In figure:1. fixture, 2. lids, 3. annular cavities, 4. lugs, 5. notches, 6. reinforcing annular parts, 7. spacing knots
Structure, 8. non-return structures, 9. convex edges.
Embodiment
The utility model is described in further detail presently in connection with accompanying drawing.These accompanying drawings are simplified schematic diagram,
Only illustrate basic structure of the present utility model in a schematic way, therefore it only shows the composition relevant with the utility model.
As shown in Figure 1-Figure 3, a kind of bolt protective cover, including fixture 1 and lid 2, fixture 1 have an annular cavity
3, the lower edge of annular cavity 3, which has to have between some lugs 4 for being easy to be fastened at nut chamfering, adj acent tab 4, is easy to spiral shell
Mother enters the notch 5 of annular cavity 3, and lid 2 is detachably set in outside fixture 1.
In a kind of embodiment, depending on the angle number for the nut that the number of lug 4 can be protected as needed, if
Nut is tetragonal nut, and fixture 1 has four lugs 4, and forms four notches 5, is easy to tetragonal nut to enter fixture 1
Annular cavity 3;Similarly, hex nut and octagon nut are also corresponding six lugs 4 and eight lugs 4 respectively;Certainly, also not only
The number for being limited only to lug 4 is identical with nut angle number, and the number of lug 4 can also be more than nut angle number, such as, eight lugs
4 can also corresponding be tetragonal nut.However, in this specific embodiment, lug 4 has 6.
In a kind of embodiment, the effect of notch 5 is easy for nut and entered in the annular cavity 3 of fixture 1, groove
The shape of mouth 5 can be circular arc or other arbitrary shapes.In this specific embodiment, notch 5 is preferably shaped to V-shaped
Notch 5.
In a kind of embodiment, the angle of V-shaped notch 5 is changeable, and the angle of notch 5 can also be 0 °,
Because the material that this nut-protecting sleeve is selected is plastics, because plastics have certain elasticity in itself, nut enters in fixture 1
During portion, the angle correspondence notch 5 of nut can force the lug 4 of the both sides of notch 5 to deform, so that nut by inward pressure
Enter inside fixture 1.Certainly, notch 5 is preferably not less than the angle at each angle of nut, need not so apply extra
Power just nut can be made to enter inside fixture 1, it is easy to use.In this specific embodiment, the opening angle of notch 5 is
Not less than 120 °, preferably 120 °.
In a kind of embodiment, in order to ensure the fixing intensity between fixture 1 and nut, on the one hand need to make
Adhesion increase between lug 4 and fixture 1, on the other hand, makes lug 4 try one's best the gap of the deep chamfering for entering nut
In, therefore, when designing 4 shape of lug, pay the utmost attention to the lug 4 of thickness stepped form from outside to inside.In this specific embodiment
In, section of the lug 4 on the section for crossing the center line of fixture 1 is triangle or wedge shape.
In a kind of embodiment, nut-protecting sleeve of the present utility model is divided into two parts, and a part is used for and spiral shell
The fixed fixture 1 of mother, another part is the lid 2 fixed with fixture 1, and lid 2 is used for nut being encapsulated in fixture 1
In chamber, prevent nut by corrosion, the inside of fixture 1 first is the cavity of annular, and outside shape can be polygon, can also
For circle, and the interior shape of lid 2 is then matches with the outer shape of fixture 1, in order to form good fixation, lid
2 outer shape can also be diversified.In this specific embodiment, it is also ring inside annular, lid 2 that fixture 1, which is,
Also it is annular outside shape, lid 2, lid 2 and fixture 1 are threadedly coupled.
In a kind of embodiment, in order to further strengthen the jail between the upper flange of fixture 1 and fixture 1
There is one and the integrally formed reinforcing annular part 6 of fixture 1 on the outside of tenacity, the lower edge of fixture 1.
Preferably, section of the reinforcing annular part 6 on the section for crossing the center line of fixture 1 is triangle, wedge shape or square
Shape.
In a kind of embodiment, in order to prevent fixture 1 from rotating excessively, make the angle of nut and the position of notch 5
It is corresponding, so as to be come off from nut.The madial wall of the annular cavity 3 of fixture 1 is used to prevent fixture 1 from rotating provided with some
Excessive position limiting structure 7, can fix the relative position of fixture 1, be conducive to settling at one go fixture 1 and be fixed on nut
On.
Wherein, position limiting structure 7 can be the rib for the vertical direction for being arranged on madial wall, and the shape of rib can be flat
Square or arc or triangle etc., which can be met, prevents fixture 1 from rotating excessive structure.In this specific embodiment
In, position limiting structure 7 is arc.
In a kind of embodiment, also with non-return structure 8, stop and return structure and an adjacent position limiting structure
7 form certain hyte, are not provided with notch 5 between the non-return structure 8 and position limiting structure 7 that are in same positioning group, make fixation
Part 1 is set in when being rotated on nut, non-return structure 8 can be crossed, so that the angle of nut is in position limiting structure 7 and non-return structure
Between 8, non-return structure 8 can not cross non-return structure 8 when fixture 1 is reversely rotated, and finally make nut and fixture 1
Between position be relatively fixed.Wherein the section of the horizontal direction of non-return structure 8 is obtuse triangle, or approximately obtuse triangle,
Wherein approximate obtuse triangle is that each side of obtuse triangle can be curve, but its global shape is similar with triangle.Obtuse angle
The obtuse angle direction of triangle is the direction of the position limiting structure 7 away from same positioning group.
In a kind of embodiment, lid 2 also includes the convex edge 9 for being easy to cover nut shim.
Using it is above-mentioned according to desirable embodiment of the present utility model as enlightenment, pass through above-mentioned description, related work people
Member can carry out various changes and amendments in the range of without departing from this utility model technological thought completely.This reality
The content on specification is not limited to new technical scope, it is necessary to its technology is determined according to right
Property scope.