CN221569172U

CN221569172U - Nut protective cap

Info

Publication number: CN221569172U
Application number: CN202420003698.1U
Authority: CN
Inventors: 宋宁; 李金鹏; 李进; 王聪; 卢长魁; 高金城; 崔智猛
Original assignee: Shandong Beno Cooling Equipment Co ltd
Current assignee: Shandong Beno Cooling Equipment Co ltd
Priority date: 2023-12-29
Filing date: 2024-01-02
Publication date: 2024-08-20
Anticipated expiration: 2034-01-02
Also published as: CN221824265U; CN221569171U; CN222163174U

Abstract

A nut protective cap relates to the technical field of nut protective devices, and comprises a threaded connection part, a nut accommodating part and a bolt tail accommodating part, wherein the surface of an inner cavity of the threaded connection part is provided with internal threads; the nut accommodating part is internally provided with a nut accommodating space; the upper side of the nut accommodating space is communicated with the inner cavity of the threaded connecting part, and the nut accommodating space is provided with a hole opening downwards; the bolt tail accommodating part is arranged on the upper side of the threaded connection part, and a bolt end accommodating space is formed in the bolt tail accommodating part; a communication channel is arranged in the nut protective cap and is communicated with the nut accommodating space and the bolt end accommodating space, and the communication channel provides a passage for grease to flow between the nut accommodating space and the bolt end accommodating space.

Description

Nut protective cap

Technical Field

The utility model relates to the technical field of nut protection devices, in particular to a nut protection cap.

Background

When the wind generating set, the street lamp equipment and other mechanical equipment are installed, the bases of the wind generating set and the street lamp are provided with exposed nuts and anchor bolt rods extending out of the end faces of the bases, and if the nuts and the anchor bolt rods are not protected, the nuts and the anchor bolt rods can be corroded and are difficult to disassemble.

In construction, the depth of the anchor bolt buried underground often changes, so that the length of the head part of the bolt exposed outside the nut is different, the bottom of the nut protective cap can not cover the nut completely, and the protective effect is not achieved. For example, chinese patent publication No. CN213744390U discloses a nut and bolt protective cap, which includes a hollow cap body with one end open, a bolt cavity and a nut cavity are coaxially disposed in the cap body, the nut cavity is communicated with the opening and the bolt cavity, a plurality of self-tapping connection ribs adapted to the bolt are radially protruded from the inner wall of the bolt cavity, and the self-tapping connection ribs extend along the length direction of the bolt cavity.

In addition, part of the prior art bolt and nut protective caps are provided with internal threads which are in threaded connection with the head of the bolt. For example, chinese patent publication No. CN202165379U discloses a nut and bolt protective cap, which comprises a hollow cap body with one end open, a cylindrical bolt cavity and a nut cavity are coaxially arranged in the cap body from inside to outside, the inner diameter of the bolt cavity is smaller than that of the nut cavity, and threads are arranged in the bolt cavity. Under the condition that the head lengths of the bolts are different, the top ends of the nut protective caps are damaged due to the fact that the threads are excessively rotated, and the nut protective caps lose protective effects. In the utility model, if rust-proof media such as grease are filled in the threaded cavity, excessive grease in the threaded cavity is not easy to discharge when the nut protective cap is installed, and difficulty is caused to installation of the nut protective cap.

Disclosure of utility model

The utility model provides a nut protective cap aiming at the technical problems in the prior art, wherein a communication channel for communicating the nut accommodating space and the bolt end accommodating space is arranged in the nut protective cap, so that the technical problems are solved.

To achieve the above technical object, an embodiment of the present utility model provides a nut protective cap, including:

The surface of the inner cavity of the threaded connection part is provided with an internal thread;

A nut accommodating portion having a nut accommodating space therein; the upper side of the nut accommodating space is communicated with the inner cavity of the threaded connection part, and the nut accommodating space is provided with a hole opening downwards; and

The bolt tail accommodating part is arranged on the upper side of the threaded connection part and is internally provided with a bolt end accommodating space;

the nut protective cap is internally provided with a communication channel which is communicated with the nut accommodating space and the bolt end accommodating space.

In some embodiments, the communication passage is a groove formed to intercept the internal thread in a direction connecting the nut receiving space and the bolt end receiving space.

In some embodiments, the groove intercepts the internal thread in a generally up-down direction.

In some embodiments, the groove is deep below the groove bottom of the internal thread.

In some embodiments, the communication passage is a through hole formed in a side wall of the screw connection portion and extending in a direction connecting the nut receiving space and the bolt end receiving space.

In some embodiments, the nut receiving space and/or the bolt end receiving space are internally filled with grease.

One or more technical solutions provided in the embodiments of the present utility model at least have the following technical effects or advantages: the interior of the nut protective cap is provided with the communication channel which is communicated with the nut accommodating space and the bolt end accommodating space, so that when the nut protective cap is installed, grease can be discharged from the bolt end accommodating space to the nut accommodating space, and the installation convenience is improved. When the tail receiving portion is elongated, the communication passage may serve as a passage through which grease flows from the nut receiving space to the bolt end receiving space. The communication passage provides a passage through which grease flows between the nut accommodating space and the bolt end accommodating space.

Drawings

Fig. 1 is a schematic view of an installation structure of a nut helmet according to a first embodiment of the present utility model.

Fig. 2 is a schematic structural view of a telescopic portion according to an embodiment of the present utility model, and fig. 3 is a schematic structural view of a telescopic portion according to another embodiment of the present utility model.

Fig. 4 is a schematic structural diagram of an outer shape of a nut helmet according to a first embodiment of the present utility model.

Fig. 5 is a cross-sectional view of a nut helmet according to a first embodiment of the present utility model.

Fig. 6 is a bottom view of the nut helmet according to the first embodiment of the present utility model.

Fig. 7 is a schematic view of an application scenario of the nut helmet according to the first embodiment of the present utility model.

Fig. 8 is a cross-sectional view of a nut helmet according to an example of the second embodiment of the present utility model.

Fig. 9 is a cross-sectional view of a nut helmet according to another example of the second embodiment of the present utility model.

Fig. 10 is a cross-sectional view and a partial enlarged view of a nut helmet according to an example of a third embodiment of the present utility model.

Fig. 11 is a cross-sectional view of a nut helmet according to another example of the third embodiment of the present utility model.

Fig. 12 is a cross-sectional view and a partial enlarged view of a nut helmet according to an embodiment of the present utility model.

Fig. 13 is a cross-sectional view of a nut helmet according to an example of the fifth embodiment of the present utility model.

Description of the reference numerals

1. 2, 3, 4, 5-Nut protective cap, 101-nut receiving portion, 1011-second male structure, 1012-second female structure, 102-nut receiving space, 103-threaded connection portion, 104-telescoping portion, 1041-first male structure, 1042-first female structure, 105-bolt end receiving space, 106-operating portion, 107' -communicating channel, 108, 508-flanging portion, 109-orifice, 110-inner end face, 111, 211, 311, 411, 511-top wall;

202. 302, 402-first connection, 203, 303, 403-second connection, 204, 304, 404-tailstock receiving portion, 305-annular projection, 306-annular slot;

405-claw, 406-tooth;

501-nut receiving part, 502-telescoping cylinder, 503-threaded connection part,

100-Of a bolt connection assembly, 10-of a bolt, 11-of a tail end, 20-of a nut, 30-of a gasket, 40-of a lamp post, 41-of a flange and 50-of a filling medium;

P-mounting plane, AA' -central axis.

Detailed Description

Other objects and advantages of the present utility model will become apparent from the following explanation of the preferred embodiments of the present utility model.

First embodiment

As shown in fig. 1, the nut helmet 1 is sleeved on the outer side of the bolt connection assembly 100, and the bolt connection assembly 100 includes a tail end 11 of a bolt 10 and a nut 20. In some embodiments, the bolting assembly 100 further comprises a washer 30 mounted between the nut 20 and the mounting plane P. The bolt 10 may be, for example, an anchor bolt, a hexagon head bolt, or the like, and the present application is not limited thereto.

As shown in fig. 1, the nut helmet 1 includes a nut accommodating portion 101, a screw connection portion 103, and a telescoping portion 104. The inner cavity surface of the threaded connection 103 has an internal thread. Which can be screwed with the tail end 11 of the bolt 10 protruding from the upper end of the nut 20. The nut helmet 1 of the present application can thus be mounted on the bolt 10 in a rotatable manner. Compared with the simple technical scheme of sleeving the nut protective cap 1 on the bolt 10 and the nut 20, the installation mode has high firmness.

A nut accommodating portion 101 is provided below the screw connection portion 103. The nut accommodating portion 101 has therein a nut accommodating space 102 for accommodating the nut 20. The upper side of the nut accommodating space 102 communicates with the inner cavity of the screw connection portion 103, and the nut accommodating space 102 has a hole 109 opened downward. When the nut helmet 1 is mounted, the nut helmet 1 is covered outside the nut 20 and the tail end 11 of the protruding bolt 10 through the open hole 109.

The expansion and contraction portion 104 is provided above the screw connection portion 103, and a bolt end receiving space 105 is provided in the expansion and contraction portion 104. The top of the expansion and contraction portion 104 has a top wall 111, and the distance between the top wall 111 and the screw connection portion 103 is set to be able to be lengthened or shortened according to the length of the end portion (hereinafter referred to as the tail end 11) of the bolt 10 protruding from the upper end of the nut 20.

The shape of the top wall 111 is not particularly limited, and the present application may be, for example, a convex circular arc shape, a planar structure, or the like.

In the nut helmet 1 of the present embodiment, the length of the expansion and contraction portion 104 can be changed according to the length of the tail end 11, so that the nut helmet 1 can be prevented from being damaged by the tail end 11.

Fig. 2 is a schematic structural view of a telescopic portion 104 according to an embodiment of the present utility model, and fig. 3 is a schematic structural view of a telescopic portion 104 according to another embodiment of the present utility model.

For example, in some embodiments, as shown in fig. 2, the telescoping portion 104 has a first convex structure 1041 along a radial direction, the first convex structure 1041 being disposed around the entire circumference of the telescoping portion 104. In another embodiment, as shown in fig. 3, the telescoping portion 104 has a first concave structure 1042 that is concave in a radial direction, and the first concave structure 1042 is disposed around the entire circumference of the telescoping portion 104.

When the nut helmet is screwed on the tail end 11 of the bolt 10 and the length of the tail end 11 is too long, the upper surface of the end of the bolt 10 abuts against the lower side surface of the top wall 111 of the nut helmet 1, and the first male structure 1041 or the first female structure 1042 allows the expansion part 104 to deform so as to be elongated or shortened according to the different lengths of the tail end 11 of the bolt 10.

To enhance the telescoping ability of the telescoping portion 104, the present disclosure further provides for a stacked first concave structure 1042 and/or first convex structure 1041. For example, in some embodiments, the first concave structures 1042 are stacked in an up-down direction. Or the first male structures 1041 are stacked in the up-down direction. Alternatively, the first concave structures 1042 and the first convex structures 1041 are stacked in the up-down direction, and the stacked structures allow the expansion and contraction portion 104 to have a larger deformability. For another example, as shown in fig. 1, the first concave structures 1042 and the first convex structures 1041 of the expansion and contraction part 104 are alternately stacked in the up-down direction to form a bellows shape.

Fig. 4 is a schematic view of the external structure of a nut helmet 1 according to a first embodiment of the present utility model.

In some embodiments, as shown in fig. 4, the nut helmet 1 includes, from bottom to top, a nut accommodating portion 101, an operating portion 106, and a telescoping portion 104. A burring 108 is provided at the bottom of the nut accommodating portion 101. At the top of the telescoping portion 104 there is a top wall 111.

In the present disclosure, an operation portion 106 extending in the up-down direction is provided on the outer contour of the nut cap 1, and the nut cap can be screwed to the tail end 11 of the bolt 10 by the operation portion 106. The operation portion 106 functions to facilitate the application of torque to the nut helmet 1. The outer peripheral surface of the operation portion 106 may be, for example, hexagonal in structure. The outer peripheral surface of the operation portion 106 may be cylindrical, or may be shaped so as to apply torque to the nut cap, for example, prismatic, or cylindrical with anti-slip patterns, or may be formed as a groove, a bump, or the like formed on the outer side of the nut cap 1. The present application is not particularly limited thereto.

Further, the operation portion 106 may be formed at a position corresponding to the screw connection portion 103.

In some embodiments, as shown in fig. 1, in order to improve the protection effect on the bolts 10, nuts 20 and avoid rust, a filling medium 50, preferably grease, such as butter, is provided in the nut accommodating space 102 and the bolt end accommodating space 105.

Fig. 5 is a cross-sectional view of a nut helmet 1 according to a first embodiment of the present utility model. Fig. 6 is a bottom view of the nut helmet 1 according to the first embodiment of the present utility model.

As shown in fig. 5 and 6, in the present embodiment, in order to facilitate the escape of grease and the discharge of air from the bolt end accommodating space 105 when the nut is connected to the bolt 10, in the present application, a communication passage 107 is provided in the nut helmet 1, which communicates the nut accommodating space 102 and the bolt end accommodating space 105. For example, the communication passage 107 may be formed as a groove that intercepts the internal thread in the direction connecting the nut accommodating space 102 and the bolt end accommodating space 105, the groove intercepts the internal thread in the substantially up-down direction, and may be further deeply cut below the groove bottom of the internal thread. When the nut cap is screwed to the end of the bolt 10, the communication passage 107 passes through the screw thread outside the screw thread of the bolt 10, and the nut accommodating space 102 and the bolt end accommodating space 105 are communicated, and when the nut cap is screwed, the bolt end accommodating space 105 is closed by the internal screw thread screwed to the bolt 10, and grease and air are pressed and flow from the communication passage 107 to the nut accommodating space 102.

In addition, as shown in fig. 5, the communication passage 107' may also be a through hole that is formed in the side wall of the screw connection portion 103 and extends in the direction of connecting the nut accommodation space 102 and the bolt end accommodation space 105.

It should be noted that, the communication channel 107 and the communication channel 107' are different technical solutions, and may be applied alternatively or in combination during implementation.

In actual construction, there are situations that the thickness of the nut 20 is different, for example, a part of working conditions adopt nuts 20 with normal thickness, while other working conditions adopt thin nuts 20 or thickened nuts 20, in the prior art, the nut protective caps with the same specification are difficult to meet the use requirements of the working conditions at the same time, the specification types of the nut protective caps 1 are increased, and the interchangeability is reduced.

In order to solve the above-mentioned problems, the present application provides a telescopic structure on the wall of the nut accommodating portion 101, for example, as shown in fig. 1, the wall of the nut accommodating portion 101 has a second concave structure 1012 concave along the radial direction, and the second concave structure 1012 is provided around the entire circumference of the nut accommodating portion 101. For another example, the nut housing 101 has a second outward protruding structure 1011 along the radial direction, and the second outward protruding structure 1011 is provided around the entire circumference of the nut housing 101.

In the process of installing the nut cap 1 on the bolt 10, first, the nut cap 1 is fitted over the nut 20 and the outside of the bolt 10, and the nut cap 1 is rotated to connect the female screw of the screw connection portion 103 in the nut cap 1 with the male screw of the tail end 11 of the bolt 10. Continuing to rotate the nut helmet 1, the edge of the orifice 109 at the lower end of the nut receiving portion 101 contacts the installation plane P. Then, with the increase of the screwing depth of the nut protective cap 1 and the tail end 11 of the bolt 10, the telescopic structure is extruded and deformed until the inner end surface 110 abuts against the upper end surface of the nut 20, so that the nut protective cap can adapt to the protection requirements of nuts 20 with different thicknesses.

In the present embodiment, since the telescopic structure is deformed, a pressing force for pressing the lower end orifice 109 of the nut housing 101 against the mounting plane and keeping the orifice 109 in contact with the mounting plane P can be provided. The above-mentioned pressing force is advantageous to isolate the interior of the nut helmet 1 from the exterior space, and plays a role in preventing the tail end 11 and the nut 20 from being rusted.

To enhance the sealing effect of the aperture 109 with the mounting plane, as shown in fig. 1, in some embodiments, the edges of the aperture 109 of the nut receiving portion 101 extend both radially outward and axially downward to form a burring 108. After the nut waterproof cap is screwed to the tail end 11 of the bolt 10, the burring 108 tends to be deformed in the horizontal direction, forming an annular contact surface with the installation plane P. The sealing performance between the inner space of the nut waterproof cap and the atmosphere can be enhanced by means of the filling medium 50. Even if the mounting plane P has a certain convex-concave shape, the seal can be maintained due to the adaptive deformation of the edge of the burring 108.

In addition, when the outside of the nut helmet 1 has water accumulation, the pressure F of the water accumulation acts on the surface of the burring 108 located outside the nut helmet 1, further improving the contact force value between the edge of the burring 108 and the installation plane, thereby improving the sealing capability between the edge of the burring 108 and the installation plane, and the greater the pressure F, the stronger the sealing capability.

In some embodiments, in order to further improve the telescopic deformation capability of the telescopic structure, the telescopic structure has various preferred technical solutions. For example, the second concave structure 1012 and the second convex structure 1011 are stacked in the up-down direction. For another example, the second concave structures 1012 are stacked in the up-down direction. For another example, the second protruding structures 1011 are stacked in the up-down direction. Further, the second concave structure 1012 and the second convex structure 1011 of the nut accommodating portion 101 are alternately stacked in the up-down direction to form a bellows-like structure.

Fig. 7 is a schematic view of an application scenario of the nut helmet 1 according to the first embodiment of the present utility model.

The nut helmet 1 of the present application can be applied to the scene shown in fig. 7, most of the anchor bolts are buried underground, the flange 41 at the lower portion of the lamp post 40 has a plurality of through holes, and the upper ends of the anchor bolts pass through the through holes and expose a section. The nut 20 is threadedly coupled to the exposed portion of the anchor bolt to secure the flange 41 and the lamp post 40. At this time, the upper surface of the flange 41 becomes the mounting plane P.

As can be seen from fig. 7, the expansion and contraction portion 104 of the nut helmet 1 according to the present embodiment can be extended or shortened according to the difference in the length of the anchor bolt exposed to the outside of the nut 20. Therefore, the expansion and contraction portion 104 in the present embodiment may be a plug-tail accommodating portion.

The telescopic structure can be extended or shortened according to the thickness of the nut 20. Therefore, the nut protective cap 1 of the present embodiment can adapt to the working conditions that the outer tail end 11 of the bolt 10 is exposed to different lengths, and also adapt to the working conditions that the thickness of the nut 20 is different. The nut protective cap 1 disclosed by the invention has strong interchangeability, so that the specification types can be effectively reduced, and the stock quantity is reduced.

Second embodiment

The nut helmet 2 of the present embodiment is different from the first embodiment in that the nut helmet 2 of the present embodiment has a split structure.

Fig. 8 is a cross-sectional view of a nut helmet 2 according to an example of the second embodiment of the present utility model.

For example, in some embodiments, as shown in fig. 8, the pin tail receiving portion 204 has a separate structure from the threaded connection portion 103, and the pin tail receiving portion 204 is connected to the threaded connection portion 103 by a tail end connection portion.

The tail end connection portion includes a first connection portion 202 formed at a lower end of a plug tail receiving portion 204, the first connection portion 202 having an internal thread. Correspondingly, the tail end connection part further comprises a second connection part 203 formed at the upper end of the threaded connection part 103, and the second connection part 203 is provided with external threads. The internal thread of the first connecting portion 202 is connected with the external thread of the second connecting portion 203.

It should be noted that external threads may be formed at the first connection portion 202, and corresponding internal threads may be formed at the second connection portion 203. The external thread of the first connection portion 202 is connected with the internal thread of the second connection portion 203.

In the present embodiment, the distance between the top wall 211 and the screw connection portion 103 is adjusted by adjusting the number of screws by which the plug tail receiving portion 204 is screwed into the screw connection portion 103.

In addition, the bolt tail receiving portion 204 with different lengths can be replaced to meet the requirement that the end of the bolt 10 is exposed to the nut 20 with different lengths.

Fig. 9 is a cross-sectional view of a nut helmet 2 according to another example of the second embodiment of the present utility model.

For example, in some embodiments, the plug-tail receiving portion 204 further includes a first concave structure 1042 and a first convex structure 1041, and the first concave structure 1042 and the first convex structure 1041 are alternately stacked in the up-down direction to form a bellows shape.

Third embodiment

In this embodiment, the plug-tail accommodation portion 304 and the screw connection portion 103 have a separate structure, and the difference between this embodiment and the second embodiment is that in this embodiment, the plug-tail accommodation portion 304 and the screw connection portion 103 are engaged and connected by the tail connection portion.

Fig. 10 is a cross-sectional view of a nut helmet 3 according to an example of the third embodiment of the present utility model.

The tail end connection portion includes a first connection portion 302 formed at a lower end of the plug tail receiving portion 304, and a second connection portion 303 formed at an upper end of the screw connection portion 103. The first connecting portion 302 is engaged with the second connecting portion 303.

As shown in fig. 10, in some embodiments, for example, the trailing end connection includes an annular detent 306 formed in the inner contoured surface of the trailing end receiving portion 304, and an annular protrusion 305 formed on the outer surface of the threaded connection 103 and engaged with the annular detent 306.

In other embodiments, for example, the trailing end connection includes an annular protrusion 305 formed on an inner contoured surface of the plug-tail receiving portion 304, and an annular detent 306 formed on an outer surface of the threaded connection 103 and engaged with the annular protrusion 305.

In this embodiment, the number of the annular clamping grooves 306 is plural, and the plurality of annular clamping grooves 306 are disposed at intervals along the up-down direction. In this embodiment, the distance between the top wall 311 and the threaded connection 103 is adjusted by selecting annular clamping grooves 306 at different height positions to be clamped with the annular protrusions 305.

Fig. 11 is a cross-sectional view of a nut helmet 3 according to another example of the third embodiment of the present utility model.

As shown in fig. 11, in some embodiments, for example, the plug-tail accommodation portion 304 further includes a first concave structure 1042 and a first convex structure 1041, and the first concave structure 1042 and the first convex structure 1041 are alternately stacked in the up-down direction to form a bellows shape. In this embodiment, the length of the tail end 11 of the bolt 10 is adapted to be different by expansion and contraction of the bellows-like structure in the tail receiving portion 304.

Fourth embodiment

As shown in fig. 12, the nut helmet 4 has a split structure including a nut accommodating portion 101 and a screw connection portion 103, the nut accommodating portion 101 and the screw connection portion 103 being integrally formed. The plug tail receiving portion 404 is connected to the screw connection portion 103 by a tail end connection portion.

In some embodiments, the pin tail receiving portion 404 has a first connection portion 402 and the threaded connection portion 103 has a second connection portion 403. The inner contour of the first connecting portion 402 has a plurality of latches 406 distributed in the up-down direction. The second connecting portion 403 has a claw 405 in an outer contour, and the claw 405 has a zigzag-shaped outer contour. The structure of the latch 406 is adapted to the structure of the claw 405.

When the plug receiving portion 404 is connected to the screw connection portion 103, the plug receiving portion 404 is engaged with the second connection portion 403 at the tip of the screw connection portion 103 from top to bottom. During the installation, the claw 405 engages with the latch 406, and the latch 406, which can be adjusted to different height positions according to the length of the tail end 11 of the bolt 10, engages with the claw 405.

The claw 405 has a barb structure, which allows the tail receiving portion 404 to relatively move from top to bottom, and restricts the tail receiving portion 404 from relatively moving from bottom to top, so that the nut protective cap can be mounted, and the tail receiving portion 404 is prevented from being separated from the threaded connection portion 103.

In addition, in other embodiments, the tail end connection part includes a plurality of latches 406 formed at an outer contour surface of the second connection part 403 of the screw connection part 103 and distributed in an up-down direction, and claws 405 formed at an inner contour surface of the first connection part 402 of the tail receiving part 404 and selectively engaged with the latches 406 to maintain the tail receiving part in a release-preventing state.

Fifth embodiment

As shown in fig. 13, the nut helmet 5 of the present embodiment includes a nut housing portion 501, a telescopic cylinder 502, and a screw connection portion 503.

The nut accommodating portion 501 has a nut accommodating space 102 for accommodating the nut 20 (not shown). In order to meet the use requirements of nuts 20 with different thicknesses, in the nut protective cap 5 of the embodiment, the inner contour of the upper part of the telescopic cylinder 502 is provided with an internal thread; an external thread is provided on the lower outer contour of the nut housing 501. The telescopic cylinder 502 and the nut housing 501 are screwed by the above-mentioned internal screw and external screw.

When in use, the height of the nut accommodating space 102 is adjusted by adjusting the screwing number of the telescopic cylinder 502 and the nut accommodating part 501, so as to adapt to the use requirements of nuts 20 with different thicknesses.

In some embodiments, the lower end aperture of the telescoping cylinder 502 is provided with a flange portion 508, the flange portion 508 being formed by the telescoping cylinder 501 extending radially outward and axially downward at the same time.

In use, the lower edge of the cuff 508 abuts against the mounting plane P. By rotating the rotary telescopic cylinder 502 to increase the acting force between the flanging part 508 and the installation plane P, the lower end edge of the flanging part 508 is abutted against the installation plane P, and even if the surface of the installation plane P has a certain convex-concave shape, sealing can be realized through the deformation of the lower end edge of the flanging part 508, so that external rainwater and the like are prevented from entering the nut protective cap 5, and corrosion of the bolts 10 and the nuts 20 of the nut 20 is prevented.

In this embodiment, the tail receiving portion 204 includes a top wall 511, the tail receiving portion 204 is provided with a tail end connecting portion, the tail end connecting portion includes an internal thread formed on an inner contour of the tail receiving portion 204 and an external thread formed on an outer contour of an upper end of the threaded connecting portion 503, the tail receiving portion 204 is connected with the threaded connecting portion 503 through the internal thread and the external thread, and a distance between the top wall 511 and the threaded connecting portion 503 is adjusted by adjusting a screwing number of the tail receiving portion 204 and the threaded connecting portion 503, so that a height of the bolt end receiving space 105 is adjusted, and further, working conditions of different lengths of the tail end 11 extending from an upper end of the nut 20 of the bolt 10 are adapted.

The apparatus of the present application has been described in detail with reference to the preferred embodiments thereof, however, it should be noted that any adaptations, modifications and variations can be made by persons skilled in the art based on the foregoing disclosure without departing from the spirit of the present application. The application includes the specific embodiments described above and any equivalents thereof.

Claims

1. A nut protective cap, comprising:

2. The nut helmet of claim 1, wherein,

The communication passage is a groove formed in a direction connecting the nut accommodating space and the bolt end accommodating space to intercept the female screw.

3. The nut helmet of claim 2, wherein,

The groove intercepts the internal thread in a substantially vertical direction.

4. The nut helmet of claim 2, wherein,

The groove is deeply cut below the groove bottom of the internal thread.

5. The nut helmet of claim 1, wherein,

The communication passage is a through hole formed in a side wall of the screw connection portion and extending in a direction connecting the nut accommodation space and the bolt end accommodation space.

6. The nut helmet as defined in any one of claims 1 to 5, wherein,

The nut accommodating space and/or the inside of the bolt end accommodating space is filled with grease.