CN205101372U

CN205101372U - Bolt protective hood

Info

Publication number: CN205101372U
Application number: CN201520910755.5U
Authority: CN
Inventors: 李伟华
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-11-16
Filing date: 2015-11-16
Publication date: 2016-03-23
Anticipated expiration: 2025-11-16

Abstract

The utility model discloses a bolt protective hood, the safety cover is inside to be equipped with the first cavity that holds the gasket from bottom to top in proper order, hold the second cavity of nut and hold the end part of the screw rod's third cavity, first cavity, second cavity and third cavity communicate from beginning to end, the inner wall of third cavity is provided with the internal thread that matches with the the end part of the screw rod external screw thread, can fix on the inner wall of third cavity after messenger the end part of the screw rod stretches into.

Description

Bolt protective cover

Technical field

The utility model relates to a kind of bolt protecting device, particularly one and is enclosed within pad, nut and screw rod end, and what prevent screw bolt and nut corrosion can avoid again its bolt protective cover come off under vibration environment.

Background technique

Bolt commonly uses link as one, is widely used in the fields such as various Static Equipment, railway, bridge, shield tunnel, building.Bolt is threaded connection formation fastening piece with screw rod and nut, and nut is slightly stretched out in the end of usual screw rod.The below of nut is also provided with pad.In use, bolt exposes in the environment usually, by the corrosion of air, sleet and corrosive material, not only reduce working life but also safety problem may be brought to productive life traffic, cause nut together with screw rod rust owing to getting rusty simultaneously, be not easy dismounting, bring constant to maintenance and replacing.

In order to prevent screw rod together with nut corrosion, increase bolt working life, a kind of technological scheme adopts stainless steel bolt, but cost significantly increases.Another is apply grease on bolt, although the method can be antirust, can affect attractive in appearance, also easily causes drip of grease fall other relevant equipment or pollute adjacent object.A kind of technology is also had to have employed Bolt-protecting cap exactly; but owing to being used in the place of vibrations; occlusion property between bolt with protective cap is inadequate, causes loose or dislocation, also likely bump against equipment, means of transportation or other object in motion when coming off after a period of time.

Model utility content

The purpose of this utility model is to provide a kind of bolt protective cover, and what can prevent screw bolt and nut corrosion can avoid again it to come off under vibration environment.

To achieve these goals, a kind of bolt protective cover that the utility model provides, safety cover inside is provided with the first cavity holding pad, the second cavity holding nut from bottom to top successively and holds the 3rd cavity of screw rod end; First cavity, the second cavity are communicated with the 3rd cavity head and the tail;

The inwall of the 3rd cavity is provided with the internal thread mated with screw rod end outside thread, can be fixed on the inwall of the 3rd cavity after screw rod end is stretched into.

Preferably, the internal diameter of described first cavity is greater than the internal diameter of the second cavity, and the internal diameter of the second cavity is greater than the internal diameter of the 3rd cavity, makes the inside of bolt protective cover form the cavity volume of ladder-type.

Preferably, the outer wall of described safety cover is provided with anti-slip part.

Further, described anti-slip part is protruding structure.

Further, described protruding structure is arranged on the outer wall of the second cavity.

Alternatively, described protruding structure is the cleat along the second chamber outer wall longitudinal extension.

Preferably, the quantity of described cleat is at least two.

Preferably, the quantity of described projection is 8, and is uniformly distributed along the circumference of the outer wall of the second cavity.

Preferably, described first chamber outer wall bottom is provided with the flange extended laterally, and flange bottom surface is concordant with the bottom surface of the first chamber outer wall.

Preferably, the external diameter of described first cavity is greater than the external diameter of the second cavity, and the external diameter of the second cavity is greater than the external diameter of the 3rd cavity, makes the external frame of bolt protective cover be ladder-type.

Preferably, described first cavity inner wall is provided with sealant layer.

The bolt protective cover that the utility model provides, is provided with the first cavity holding pad, the second cavity holding nut from bottom to top successively and holds the 3rd cavity of screw rod end in safety cover inside; First cavity, the second cavity are communicated with the 3rd cavity head and the tail, and the inwall of the 3rd cavity is provided with the internal thread mated with screw rod end outside thread, can be fixed on the inwall of the 3rd cavity after screw rod end is stretched into.After adopting said structure; all can cover in being exposed to outside pad, nut and screw rod end on the one hand; prevent corrosion; on the other hand because screw rod end thread is connected in the 3rd cavity; make bolt protective cover and bolt be exposed to outside structure to fix, not easily because vibrations come off.

Accompanying drawing explanation

Fig. 1 is the main sectional view of bolt protective cover provided by the utility model;

Fig. 2 is the plan view of bolt protective cover;

Fig. 3 is the perspective view of bolt protective cover.

In figure:

1. the first cavity 2. second cavity 3. the 3rd cavity 4. internal thread 5. anti-slip part 6. flange

Embodiment

In order to make those skilled in the art person understand the utility model scheme better, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.

Terminological interpretation: the relative position relation of "up" and "down" alleged in the utility model just for convenience of description between each parts, this also includes the limiting mode of the relative position relation be equal to it when adopting different reference direction certainly.

Please refer to Fig. 1-3, a kind of bolt protective cover that the utility model provides, its inside offers three cavitys from bottom to top, is respectively the first cavity 1, can holds the pad below nut; Second cavity 2, can hold the nut being arranged on bolt end, and the 3rd cavity 3, can hold bolt end.Three cavitys from bottom to top be arranged on bolt protective cover inside, and the internal diameter of the first cavity 1 is greater than the internal diameter of the second cavity 2, and the internal diameter of the second cavity 2 is greater than the internal diameter of the 3rd cavity 3, thus makes three cavitys form step structure in bolt protective cover inside.Due in normal circumstances, in the end of bolt, the diameter of pad is greater than the diameter of nut, the diameter of nut is greater than the diameter of end screw rod, the cavity volume adopting this internal diameter to increase step by step can make each cavity have good suitability with pad, nut and screw rod end respectively, plays firm integrally-built effect.

Correspondingly, the external diameter of the first cavity 1 is greater than the external diameter of the second cavity 2, and the external diameter of the second cavity 1 is greater than the external diameter of the 3rd cavity 3, also forms the stepped construction inner corresponding to it to make the outer wall construction of bolt protective cover.Because external and internal compositions is substantially identical, the wall thickness of each safety cover each several part can be made relatively uniform, stressed also more even when being subject to exterior vibration or impacting, not easily produce local damage.

The inwall of the 3rd cavity 3 is provided with internal thread 4, makes the 3rd cavity 3 form a tapped hole, the outside thread of this internal thread 4 and the end screw rod of bolt is to mating.After bolt protective cover being enclosed within bolt top, the screw of the 3rd cavity 3 can being coordinated with screw rod end outside thread by swivel bolt safety cover, bolt protective cover and bolt be fixed, effectively avoids because exterior vibration or impact cause bolt protective cover to come off.In addition because the length (length of the part of namely stretching out from nut) of screw rod end is unfixed, therefore the length of the 3rd cavity 3 can be set to the length being greater than the first cavity 1 and the second cavity 2, like this when screw rod end is longer, the screw-thread fit face of the 3rd cavity 3 inwall and screw rod end is larger, in conjunction with more fastening.

As further improvement; the outer wall of bolt protective cover is provided with anti-slip part 5, and this anti-slip part 5 can be specifically be arranged on the projection on the second cavity 2 outer wall, protruding from the bottom of the second cavity 2 outer wall; along the second cavity 2 outer wall longitudinal extension, form cleat.When staff's construction bolt safety cover, the width of the second cavity 2 is moderate, facilitates staff to be affectedly bashful, and when swivel bolt safety cover, cleat can avoid staff to skid, and improves installation efficiency.The structure of anti-slip part 5 is not limited in the cleat in the present embodiment, those skilled in the art can to adopt in prior art other the structure that can play skidproof effect under above-mentioned technical conceive of the present utility model, such as anti-skidding frosting or be coated on cleat by frosting further.

The quantity of cleat is preferably 8, equally and be uniformly distributed circumferentially on the outer wall of the second cavity 2.The number ratio of such cleat is more moderate, and the density degree that the second cavity 2 outer wall distributes is also comparatively suitable.Being evenly distributed in addition due to cleat, also more stable when staff is affectedly bashful.

Another improvements of the present utility model, be that the bottom of the 3rd cavity 3 outer wall is provided with a circle flange 6, the bottom surface of this flange 6 is concordant with the bottom surface of the 3rd cavity 3 outer wall.Owing to there is small gap between the 3rd cavity 3 outer wall bottom surface and the surface of safety cover institute proterctive equipment; rainwater and flue dust may flow into protective housing inside along these small gaps; by arranging above-mentioned flange 6; these gaps can be extended laterally; rainwater and flue dust are not easily flowed into; even if generation corrosion phenomenon, also can first produce at flange portion, staff can change bolt protective cover in time after finding before internal corrosion.

First cavity inner wall is coated with sealing compound, to form sealant layer, when tighted a bolt by the 3rd cavity safety cover time; sealing compound is squeezed; make sealing compound be full of nut and the gap between nut shim and safety cover, play the effect of isolated air, reduce the corrosion to bolt further.

Above bolt protective cover provided by the utility model is described in detail.Apply specific case herein to set forth principle of the present utility model and mode of execution, the explanation of above embodiment just understands core concept of the present utility model for helping.Should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model principle, can also carry out some improvement and modification to the utility model, these improve and modify and also fall in the protection domain of the utility model claim.

Claims

1. a bolt protective cover, is characterized in that, safety cover inside is provided with the first cavity holding pad, the second cavity holding nut from bottom to top successively and holds the 3rd cavity of screw rod end; First cavity, the second cavity are communicated with the 3rd cavity head and the tail;

2. bolt protective cover according to claim 1, is characterized in that, the internal diameter of described first cavity is greater than the internal diameter of the second cavity, and the internal diameter of the second cavity is greater than the internal diameter of the 3rd cavity, makes the inside of bolt protective cover form the cavity volume of ladder-type.

3. bolt protective cover according to claim 1, is characterized in that, the outer wall of described safety cover is provided with anti-slip part.

4. bolt protective cover according to claim 3, is characterized in that, described anti-slip part is protruding structure.

5. bolt protective cover according to claim 4, is characterized in that, described protruding structure is arranged on the outer wall of the second cavity.

6. bolt protective cover according to claim 5, is characterized in that, described protruding structure is the cleat along the second chamber outer wall longitudinal extension.

7. bolt protective cover according to claim 6, is characterized in that, the quantity of described projection is 8, and is uniformly distributed along the circumference of the outer wall of the second cavity.

8., according to the arbitrary described bolt protective cover of claim 1-7, it is characterized in that, described first chamber outer wall bottom is provided with the flange extended laterally, and flange bottom surface is concordant with the bottom surface of the first chamber outer wall.

9., according to the arbitrary described bolt protective cover of claim 1-7, it is characterized in that, the external diameter of described first cavity is greater than the external diameter of the second cavity, and the external diameter of the second cavity is greater than the external diameter of the 3rd cavity, makes the external frame of bolt protective cover be ladder-type.

10., according to the arbitrary described bolt protective cover of claim 1-7, it is characterized in that, the first cavity inner wall is provided with sealant layer.