CN211370969U

CN211370969U - Rear anti-loosening inner hexagonal round-head bolt

Info

Publication number: CN211370969U
Application number: CN201922299933.6U
Authority: CN
Inventors: 刘立华
Original assignee: Hai'an Lihua Steel Products Co ltd
Current assignee: Hai'an Lihua Steel Products Co ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-08-28
Anticipated expiration: 2029-12-19

Abstract

The utility model discloses a rear anti-loosening type inner hexagonal round-head bolt, which belongs to the technical field of bolts and comprises a round head, the lower end of the round head is fixedly connected with a straight rod part, the lower end of the straight rod part is fixedly connected with a threaded part, the central position of the round head is provided with an inner hexagonal groove and a middle hole which are distributed up and down and are communicated with each other, a matched rotating locking block is arranged in the middle hole, the upper end of the straight rod part is provided with a containing groove, the lower end of the rotating locking block is fixedly connected with a hemispherical trigger block positioned in the containing groove, the side wall of the containing groove is provided with a plurality of uniformly distributed extending holes, matched ejection blocks are arranged in the extending holes, one end of each ejection block close to the hemispherical trigger block is fixedly connected with an avoiding hemisphere, the avoiding hemisphere is in contact with the hemisphere in a mutually laminating way, after the bolt is screwed, the rear ejection block is used for expansion and jacking, the stability of bolt is improved, and not hard up phenomenon appears.

Description

Rear anti-loosening inner hexagonal round-head bolt

Technical Field

The utility model relates to a bolt technical field, more specifically say, relate to a rearmounted locking formula hexagon socket head cap bolt.

Background

The bolts are generally classified into outer hexagon bolts and inner hexagon bolts according to the structure of the use environment, and the bolts with the performance grade of 10.9 or above are high-strength bolts. The outer hexagon bolt is limited in use to a certain extent due to poor connection strength and difficult matching use with the existing original parts, and the inner hexagon bolt is widely applied and used for mechanical equipment or structures with high requirements on dimensional accuracy and performance. In the industrial field of mechanical equipment such as speed reducers, machine tools, oil pumps and injection molding machines, socket head cap screws are usually used for fastening various parts in a matching manner.

The bolt in the prior art is treated in a chemical mode, and anti-loosening glue is coated on the surface of the bolt to realize the anti-loosening performance of the bolt, but the anti-loosening performance of the bolt is obviously reduced after the bolt is repeatedly assembled and disassembled, and the anti-loosening glue is still left in the bolt during the assembling and disassembling process to cause the blockage of the bolt, so that the universality is lacked.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved

To the problem that exists among the prior art, the utility model aims to provide a rearmounted locking dynamic formula hexagon socket head cap bolt, it can realize after the bolt tightening, expands through rearmounted ejecting piece and pushes up tightly, improves the stability of bolt, is difficult for appearing not hard up phenomenon.

2. Technical scheme

In order to solve the above problems, the utility model adopts the following technical proposal.

A rear anti-loosening type hexagon socket head round-head bolt comprises a round head, wherein a straight rod part is fixedly connected to the lower end of the round head, a threaded part is fixedly connected to the lower end of the straight rod part, a round head center position is provided with an inner hexagonal groove and a middle hole which are distributed up and down and communicated with each other, a matched rotating locking block is arranged in the middle hole, a containing groove is formed in the upper end of the straight rod part, a hemisphere triggering block located in the containing groove is fixedly connected to the lower end of the rotating locking block, a plurality of uniformly distributed extending holes are formed in the side wall of the containing groove, matched ejection blocks are arranged in the extending holes, one end of each ejection block close to the hemisphere triggering block is fixedly connected with an avoiding hemisphere, the avoiding hemisphere is in contact with the avoiding hemisphere in a mutually laminating manner, expansion jacking can be realized through the rear ejection block after the bolt is screwed down, and the stability of the bolt, the loosening phenomenon is not easy to occur.

Further, the rotation locking piece includes cylindricality portion, equal fixedly connected with flat plate portion on the lateral wall of cylindricality portion both ends, and the mutual symmetry of a pair of flat plate portion, the bar groove has been dug to cylindricality portion upper end, and the cylindricality portion satisfies the whole rotation of rotation locking piece, and a pair of flat plate portion is used for realizing rotating the spacing effect after certain angle, and the bar groove then can make things convenient for the technical staff to rotate the rotation locking piece by the cooperation instrument.

Furthermore, hemisphere trigger block lower extreme is the hemisphere, hemisphere trigger block surface all is connected with the layer of polishing with dodging the hemisphere surface, makes things convenient for hemisphere trigger block and dodges the hemisphere and takes place relative extrusion removal under the cambered surface effect.

Furthermore, a limiting ring is sleeved at the joint of the ejection block and the avoidance hemisphere, the outer diameter of the limiting ring is larger than the inner diameter of the extension hole, the limiting ring plays a role in limiting the ejection block, and the ejection block is prevented from falling off from the extension hole to the outer side.

Furthermore, a plurality of anti-falling ropes are fixedly connected between the inner wall of the extension hole and the outer side wall of the ejection block, so that the ejection block is limited, and the ejection block is prevented from falling from the extension hole to the inner side.

Furthermore, one end, far away from the avoidance hemisphere, of the ejection block is fixedly connected with a friction pad, the thickness of the friction pad is 0.1-0.5mm, the friction coefficient between the ejected ejection block and the hole wall is improved, the relative sliding phenomenon is not easy to occur, and the thread part screwing stability is improved.

3. Advantageous effects

Compared with the prior art, the utility model has the advantages of:

(1) this scheme can realize after the bolt tightening, and the ejecting piece that expands through the postposition is tight in top, improves the stability of bolt, and difficult not hard up phenomenon of appearing.

(2) The rotating locking piece comprises a cylindrical part, flat plate parts are fixedly connected to the side walls of two ends of the cylindrical part, a pair of flat plate parts are symmetrical to each other, a strip-shaped groove is formed in the upper end of the cylindrical part, the cylindrical part meets the requirement of integral rotation of the rotating locking piece, the pair of flat plate parts are used for achieving the limiting effect after rotating a certain angle, and the strip-shaped groove can be matched with a tool to facilitate the rotation of a technician.

(3) The hemisphere triggers the piece lower extreme and is the hemisphere, and hemisphere triggers the piece surface and dodges the hemisphere surface and all is connected with the layer of polishing, makes things convenient for hemisphere trigger piece and dodges the hemisphere and takes place relative extrusion removal under the cambered surface effect.

(4) The connecting part of the ejection block and the avoidance hemisphere is sleeved with a limiting ring, the outer diameter of the limiting ring is larger than the inner diameter of the extension hole, the limiting ring plays a role in limiting the ejection block, and the ejection block is prevented from falling off from the extension hole to the outer side.

(5) A plurality of anti-falling ropes are fixedly connected between the inner wall of the extension hole and the outer side wall of the ejection block, so that the ejection block is limited and prevented from falling from the extension hole to the inner side.

(6) One end of the ejection block, which is far away from the avoidance hemisphere, is fixedly connected with a friction pad, and the thickness of the friction pad is 0.1-0.5mm, so that the friction coefficient between the ejected ejection block and the hole wall is improved, the relative sliding phenomenon is not easy to occur, and the thread part screwing stability is improved.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is a schematic view of the structure at A in FIG. 2;

fig. 4 is a schematic view of the internal structure of the utility model in the working state;

fig. 5 is a schematic structural view of the rotating lock block of the present invention.

The reference numbers in the figures illustrate:

the anti-falling device comprises a round head 1, a straight rod 2, a threaded part 3, an ejection block 4, a hexagonal groove 5, a hemisphere trigger block 6, a rotary locking block 7, a cylindrical part 71, a flat plate 72, a strip-shaped groove 73, an avoidance hemisphere 8, a limiting ring 9 and an anti-falling rope 10.

Detailed Description

The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention based on the embodiments of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "sleeved/connected", "connected", and the like are to be understood in a broad sense, such as "connected", which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

referring to fig. 1-2, a rear anti-loosening type hexagon socket head bolt comprises a round head 1, a straight rod part 2 is fixedly connected to the lower end of the round head 1, a threaded part 3 is fixedly connected to the lower end of the straight rod part 2, a hexagon socket 5 and a middle hole are drilled at the center of the round head 1, the hexagon socket 5 and the middle hole are distributed up and down and are communicated with each other, a matched rotating locking block 7 is arranged in the middle hole, an accommodating groove is drilled at the upper end of the straight rod part 2, a hemisphere triggering block 6 positioned in the accommodating groove is fixedly connected to the lower end of the rotating locking block 7, a plurality of uniformly distributed extending holes are drilled on the side wall of the accommodating groove, matched ejecting blocks 4 are arranged in the extending holes, an avoiding hemisphere 8 is fixedly connected to one end of the ejecting block 4 close to the hemisphere triggering block 6, the avoiding hemisphere 8 is in contact with the avoiding hemisphere avoiding 8 in a mutually attached manner, the lower end of, the hemisphere trigger block 6 and the avoiding hemisphere 8 can conveniently perform relative extrusion movement under the action of the cambered surface.

Please refer to fig. 5, the rotation locking piece 7 includes a cylindrical portion 71, the side walls of both ends of the cylindrical portion 71 are fixedly connected with a flat plate portion 72, and a pair of flat plate portions 72 are symmetrical to each other, the height of the cylindrical portion 71 is slightly higher than the flat plate portion 72, when the hemisphere trigger block 6 contacts the bottom wall of the accommodation groove, the cylindrical portion 71 is still located in the middle hole, the flat plate portion 72 is located at the lower side of the middle hole and attached to the lower end face of the round head portion 1, a strip-shaped groove 73 is formed in the upper end of the cylindrical portion 71, the cylindrical portion 71 meets the requirement of the integral rotation of the rotation locking piece 7, the pair of flat plate portions 72 is used for realizing the limiting effect after rotating a certain angle, and the strip-shaped groove 73 can cooperate with a.

Referring to fig. 3, a limiting ring 9 is sleeved at the joint of the ejection block 4 and the avoiding hemisphere 8, the outer diameter of the limiting ring 9 is larger than the inner diameter of the extending hole, the limiting ring 9 plays a role in limiting the ejection block 4 to prevent the ejection block from falling from the extending hole to the outside, and a plurality of anti-falling ropes 10 are fixedly connected between the inner wall of the extending hole and the outer side wall of the ejection block 4 to limit the ejection block 4 to prevent the ejection block from falling from the extending hole to the inside.

One end, far away from the avoidance hemisphere 8, of the ejection block 4 is fixedly connected with a friction pad, the thickness of the friction pad is 0.1-0.5mm, the friction coefficient between the ejected ejection block 4 and the hole wall is improved, relative sliding is not easy to occur, and the thread connection stability of the thread part 3 is improved.

When in use, please refer to fig. 4, a technician inserts the inner hexagonal groove 5 by a professional tool to screw the threaded portion 3, and after the screwing is completed according to the normal steps, presses the rotary locking block 7 by a rod-shaped tool, the rotary locking block 7 drives the hemispherical trigger block 6 to descend and extrude the surrounding limit ring 9 to move towards the extending hole, and the ejection block 4 starts to move out of the extending hole to abut against the hole wall, so as to improve the friction force with the hole wall, and the loosening phenomenon is not easy to occur, at this time, the flat plate portion 72 is located at the lower side of the "middle" shaped hole and is attached to the lower end face of the round head 1, the technician uses the tool clamp to enter the cylindrical portion 71 in the bar-shaped groove 73 to a certain angle, namely, the deviation between the rotary locking block 7 and the "middle" shaped hole occurs and cannot rise in the "middle" shaped hole, so as to improve the expansion and ejection stability of the ejection block 4, and the, the expansion jacking is carried out through the rear ejection block, the stability of the bolt is improved, and the loosening phenomenon is not easy to occur.

The above is only a preferred embodiment of the present invention; the scope of the present invention is not limited thereto. Any person skilled in the art should also be able to cover the technical scope of the present invention by replacing or changing the technical solution and the improvement concept of the present invention with equivalents and modifications within the technical scope of the present invention.

Claims

1. The utility model provides a rearmounted locking formula hexagon socket head cap bolt, includes button head (1), its characterized in that: round head (1) lower extreme fixedly connected with straight rod portion (2), straight rod portion (2) lower extreme fixedly connected with screw thread portion (3), round head (1) central point puts and opens chisel and have interior hexagonal groove (5) and "well" shape hole that distribute about distributing and communicate each other, "well" downthehole assorted rotation locking piece (7) that is equipped with, the chisel has the holding tank in straight rod portion (2) upper end, rotation locking piece (7) lower extreme fixedly connected with is located hemisphere trigger block (6) of holding tank, it has a plurality of evenly distributed's the hole of stretching out to open on the holding tank lateral wall, it is equipped with assorted ejecting piece (4) to stretch out downthehole, ejecting piece (4) are close to hemisphere trigger block (6) one end fixedly connected with and dodge hemisphere (8), and dodge hemisphere (8) and laminate the contact each other.

2. The rear anti-loosening hexagon socket head cap bolt according to claim 1, wherein: rotation locking piece (7) include cylindricality portion (71), equal fixedly connected with flat plate portion (72) on cylindricality portion (71) both ends lateral wall, and a pair of flat plate portion (72) symmetry each other, bar groove (73) have been dug to cylindricality portion (71) upper end.

3. The rear anti-loosening hexagon socket head cap bolt according to claim 1, wherein: the lower end of the hemisphere trigger block (6) is hemispherical, and the outer surface of the hemisphere trigger block (6) and the outer surface of the avoidance hemisphere (8) are both connected with polishing layers.

4. The rear anti-loosening hexagon socket head cap bolt according to claim 1, wherein: a limiting ring (9) is sleeved at the joint of the ejection block (4) and the avoidance hemisphere (8), and the outer diameter of the limiting ring (9) is larger than the inner diameter of the extension hole.

5. The rear anti-loosening hexagon socket head cap bolt according to claim 1, wherein: and a plurality of anti-falling ropes (10) are fixedly connected between the inner wall of the extension hole and the outer side wall of the ejection block (4).

6. The rear anti-loosening hexagon socket head cap bolt according to claim 1, wherein: one end of the ejection block (4) far away from the avoidance hemisphere (8) is fixedly connected with a friction pad, and the thickness of the friction pad is 0.1-0.5 mm.