CN209892591U

CN209892591U - Locking bolt assembly that takes off

Info

Publication number: CN209892591U
Application number: CN201920646119.4U
Authority: CN
Inventors: 梁振杰
Original assignee: Guangxi Yuchai Machinery Co Ltd
Current assignee: Guangxi Yuchai Machinery Co Ltd
Priority date: 2019-05-06
Filing date: 2019-05-06
Publication date: 2020-01-03
Anticipated expiration: 2029-05-06

Abstract

The utility model discloses an anti-loosening bolt assembly, including the bolt main part and the tight bolt that rises, the tight bolt that rises connect soon in the bolt main part, the bolt main part of the tight bolt below that rises is equipped with the heavy groove of toper, the heavy inslot of toper be equipped with the steel ball, bolt main part bottom still be equipped with a plurality of cutting grooves along axial extension, tight bolt top and the bolt main part between detachable be equipped with the parallel key with the two radial connection, the tight bolt top that rises still connect soon spacing plug screw in the bolt main part. The utility model discloses a locking bolt assembly that takes off, compact structure, reliable and stable can effectively improve threaded connection's locking effect, extension bolt assembly's life to can reuse many times, effective reduction in production cost has convenient to use, locking take off effectual, longe-lived characteristics.

Description

Locking bolt assembly that takes off

Technical Field

The utility model relates to a bolt locking take off technical field, more specifically says, it relates to an locking bolt assembly that takes off.

Background

The traditional thread connection anti-loose method mainly comprises three methods: friction locking (e.g., adding a spring washer), mechanical locking (e.g., welding a bolt), and thread pair damage locking (i.e., using a punch to damage the tail of a thread pair or using an adhesive to cure the gap between the thread pairs after screwing). The anti-loosening requirement of the threaded connection mainly ensures that the axial position of a bolt is constant and inconvenient in the service process, the traditional friction anti-loosening problem is that the pre-tightening force is declined to cause anti-loosening failure, the mechanical anti-loosening problem is that the difficulty of tightening the upper torque is high, the problem of difficulty in disassembling and recycling is high, and the defect that the torque cannot be reused when the requirement of the torque is changed exists when the anti-loosening of a thread pair is damaged, so that the anti-loosening effect of the traditional threaded connection is not ideal.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is not enough to the above-mentioned of prior art, provide a compact structure, reliable and stable locking bolt assembly that takes off, can effectively improve threaded connection's locking effect, prolong bolt assembly's life to can reuse many times, effective reduction in production cost has convenient to use, locking take off characteristics effectual, longe-lived.

The utility model adopts the technical proposal that: the utility model provides an anti-loosening bolt assembly, includes the bolt main part and rises and tightly bolts, the bolt that rises connect soon in the bolt main part, the bolt main part that rises and tightly bolts below is equipped with the heavy groove of toper in, the heavy inslot of toper be equipped with the steel ball, bolt main part bottom still be equipped with a plurality of cutting grooves along axial extension, the bolt top that rises and bolt main part between detachable be equipped with the parallel key with the two radial connection, the bolt main part of the bolt top that rises has still connect soon spacing plug screw in.

As a further improvement, the root of each cutting groove is provided with a cylindrical hole, and a thinning groove is formed in a circular ring corresponding to the root of each cutting groove.

Furthermore, the lower part of the bolt main body is provided with bolt external threads which are gradually narrowed from top to bottom, and a polish rod is arranged between the bolt external threads and the root part of the flange of the bolt main body.

Furthermore, a first cylindrical cavity and a second cylindrical cavity are sequentially arranged in the bolt body above the conical sinking groove from bottom to top, and an internal thread of the bolt is arranged on the upper portion of the second cylindrical cavity.

Further, the tensioning bolt is provided with a guide rod and an external thread rod from bottom to top in sequence, the guide rod is slidably mounted in the first cylindrical cavity, and the external thread rod is connected with the internal thread of the bolt in the second cylindrical cavity in a screwed mode.

Further, bolt main part upper portion is equipped with the installation heavy groove, the inner wall in installation heavy groove is equipped with four key grooves of evenly arranging, and is corresponding, tight bolt top that rises be equipped with the spacing draw-in groove of radial arrangement, the flat key joint respectively in key groove, spacing draw-in groove.

Furthermore, the inner wall of the mounting sinking groove is also provided with a plug screw internal thread, the limiting plug screw is a T-shaped plug screw, and the lower part of the T-shaped plug screw is screwed on the plug screw internal thread.

Furthermore, the top of the tension bolt and the top of the limit screw plug are provided with inner hexagonal sunk grooves.

Furthermore, a sealing ring is arranged between the limiting screw plug and the bolt main body.

Advantageous effects

Compared with the prior art, the utility model, have following advantage:

1. the utility model discloses an anti-loosening bolt assembly, compact structure, reliable and stable move down through the tight bolt axial that rises and promote the bolt main part and expand and increase the purpose that the bolt main part external screw thread effect pitch diameter reached and prevent the pine and take off, can effectively improve threaded connection's locking effect, need not to destroy the screw thread pair and the welded fastening bolt main part of bolt main part, extension bolt assembly's life to can reuse many times, effective reduction in production cost has convenient to use, anti-loosening is effectual, longe-lived characteristics.

2. The utility model discloses a detachable flat key will rise tight bolt and the radial locking of bolt main part, prevent the two relative rotation to reach the machinery locking to the tight bolt that rises, and further compress tightly the flat key through spacing plug screw, prevent that the flat key is not hard up, further improve locking effect.

3. The utility model discloses a set up cutting groove, the heavy groove of toper in the bolt main part, utilize the heavy groove of steel ball extrusion toper to make bolt main part radial expansion, realize expanding bolt main part external screw thread effect pitch diameter, novel structure, ingenious, the preparation is convenient, and through cutting the cylinder hole that sets up of groove root, prevent that the bolt main part from breaking, and through the design in attenuate thin groove, help the bolt main part to expand, further increase of service life and the operation of being convenient for.

Drawings

Fig. 1 is a schematic view of a front view partial section structure of the present invention;

FIG. 2 is an enlarged schematic view of a partial cross-sectional structure of a main body of the bolt of the present invention;

FIG. 3 is a schematic cross-sectional view of C-C in FIG. 2;

fig. 4 is a schematic view of the structure of the tension bolt in the present invention;

fig. 5 is a schematic top view of the tension bolt of the present invention;

fig. 6 is a schematic view of a front view cross-sectional structure of the middle limit screw plug of the present invention;

fig. 7 is a schematic structural view of the present invention in use.

Wherein: 1-bolt body, 2-tension bolt, 3-steel ball, 4-flat key, 5-limit screw plug, 6-sealing ring, 7-workpiece A, 8-workpiece B, 11-conical sinking groove, 12-cutting groove, 13-cylindrical hole, 14-thinning groove, 15-bolt external thread, 16-polished rod, 17-first cylindrical cavity, 18-second cylindrical cavity, 181-bolt internal thread, 19-installation sinking groove, 191-key groove, 192-screw plug internal thread, 21-guide rod, 22-external thread rod, 23-limit clamping groove and 24-internal hexagonal sinking groove.

Detailed Description

The invention will be further described with reference to specific embodiments shown in the drawings.

Referring to fig. 1-7, the utility model discloses a locking bolt assembly that takes off, including bolt main body 1 and tension bolt 2, wherein, tension bolt 2 connects in bolt main body 1 soon, be equipped with toper heavy groove 11 in the bolt main body 1 below tension bolt 2, be equipped with steel ball 3 in toper heavy groove 11, still be equipped with a plurality of cutting grooves 12 along axial extension in bolt main body 1 bottom, cutting groove 12 radially runs through bolt main body 1, make the lower part of bolt main body 1 cut apart into a plurality of expansion pieces, utilize steel ball 3 to extrude toper heavy groove 11, thereby make bolt main body 1 radially expand, realize expanding bolt main body 1 external screw thread effect intermediate diameter, novel structure, ingenious, the preparation is convenient, detachable is equipped with flat key 4 connecting the two radially between tension bolt 2 top and bolt main body 1, through detachable flat key 4 with tension bolt 2 and bolt main body 1 radial locking, the two are prevented from rotating relatively, so that the tension bolt 2 is prevented from being mechanically locked, the bolt main body 1 above the tension bolt 2 is also screwed with the limiting screw plug 5, the flat key 4 is further pressed through the limiting screw plug 5, the flat key 4 is prevented from being loosened, and the locking effect is further improved.

In this embodiment, the root of each cutting groove 12 is provided with a cylindrical hole 13, the cylindrical holes 13 are arranged at the roots of the cutting grooves 12, the bolt body 1 is prevented from being broken, and the ring corresponding to the roots of the cutting grooves 12 is provided with a thinning groove 14, namely, the cylindrical holes 13 are positioned on the ring-shaped thinning groove 14, so that the lower part of the bolt body 1 is divided into a plurality of elastic pieces, the expansion of the bolt body 1 is facilitated, the service life is further prolonged, and the operation is facilitated. The bolt main body 1 is provided at a lower portion thereof with a bolt male screw 15 gradually narrowed from top to bottom so as to facilitate the bolt main body 1 to be screwed into a workpiece and to contribute to expansion of the bolt main body 1, and a polish rod 16 is provided between the bolt male screw 15 and a flange root of the bolt main body 1 so as to facilitate the bolt main body 1 to bite the workpiece a7, improve connection reliability, and ensure expansion of an elastic piece formed at a lower portion of the bolt main body 1. Still be equipped with sealing washer 6 between spacing plug screw 5 and bolt main part 1 for the inner chamber to bolt main part 1 is sealed, further prolongs bolt assembly's life.

A first cylindrical cavity 17 and a second cylindrical cavity 18 are sequentially arranged in the bolt main body 1 above the conical sink 11 from bottom to top, the first cylindrical cavity 17 and the second cylindrical cavity 18 are coaxially arranged with the conical sink 11, the diameter of the second cylindrical cavity 18 is larger than that of the first cylindrical cavity 17, and the upper part of the second cylindrical cavity 18 is provided with a bolt internal thread 181; correspondingly, the tension bolt 2 is provided with a guide rod 21 and an external thread rod 22 in sequence from bottom to top, wherein the guide rod 21 is slidably installed in the first cylindrical cavity 17, and the external thread rod 22 is screwed with the bolt internal thread 181 of the second cylindrical cavity 18. The upper portion of the bolt main body 1 is provided with an installation sunken groove 19, the inner wall of the installation sunken groove 19 is provided with four key grooves 191 which are uniformly arranged, in other embodiments, the number of the key grooves 191 is two, six and the like, correspondingly, the top of the tension bolt 2 is provided with a radial limiting clamping groove 23, and the flat keys 4 are respectively clamped in the key grooves 191 and the limiting clamping groove 23, so that the bolt main body 1 and the tension bolt 2 are radially connected, and the bolt main body and the tension bolt 2 are locked. The inner wall of the mounting sinking groove 19 is also provided with a plug internal thread 192, the limiting plug 5 is a T-shaped plug, the lower part of the T-shaped plug is screwed on the plug internal thread 192, and the sealing ring 6 is arranged in a rectangular groove formed between the shoulder of the T-shaped plug and the top of the bolt main body 1. And the top of the tensioning bolt 2 and the top of the limiting screw plug 5 are provided with inner hexagonal sunk grooves 24 so as to be convenient to disassemble and assemble.

In fastening the bolt assembly of the present embodiment, the lower portion of the bolt body 1 is first passed through the workpiece a7 and screwed to the workpiece B8, and then the bolt body 1 is tightened to a predetermined torque (torque required to fasten the two workpieces); then tightening the tension bolt 2 to axially push the steel ball 3 to extrude the conical sunken groove 11, so that the external thread at the lower part of the bolt main body 1 is expanded in diameter, at the moment, ensuring that the key groove 191 on the bolt main body 1 is aligned with the limiting clamping groove 23 on the tension bolt 2, and installing the flat key 4 in the key groove 191 and the limiting clamping groove 23 to realize mechanical loosening of the tension bolt 2; and finally, installing the sealing ring 6 on the bolt main body 1, and screwing the upper limiting screw plug 5 to finish the working procedures of fastening and connecting workpieces and preventing the bolt from loosening. When the bolt is disassembled, the limiting screw plug 5 is firstly loosened and disassembled, the sealing ring 6 and the flat key 4 are taken down, then the tensioning bolt 2 is unscrewed (without screwing out and without moment), and finally the bolt main body 1 is unscrewed and screwed out. The utility model discloses an anti-loosening bolt assembly, compact structure, reliable and stable move down through the tight bolt axial that rises and promote the bolt main part and expand and increase the purpose that the bolt main part external screw thread effect pitch diameter reached and prevent the pine and take off, can effectively improve threaded connection's locking effect, need not to destroy the screw thread pair and the welded fastening bolt main part of bolt main part, extension bolt assembly's life to can reuse many times, effective reduction in production cost has convenient to use, anti-loosening is effectual, longe-lived characteristics.

The above is only the preferred embodiment of the present invention, and it should be noted that for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which will not affect the utility model and the utility of the patent.

Claims

1. The utility model provides an anti-loosening bolt assembly, a serial communication port, includes bolt main part (1) and tight bolt (2) that rises, tight bolt (2) that rises connect soon in bolt main part (1), be equipped with toper heavy groove (11) in bolt main part (1) of tight bolt (2) below that rises, toper heavy groove (11) in be equipped with steel ball (3), bolt main part (1) bottom still be equipped with a plurality of cutting groove (12) along axial extension, tight bolt (2) top and bolt main part (1) between detachable be equipped with flat key (4) with the two radial connection, the bolt main part (1) of tight bolt (2) top that rises in still connect soon spacing plug screw (5).

2. Anti-loose bolt assembly according to claim 1, characterized in that the root of each cutting groove (12) is provided with a cylindrical hole (13) and a thinning groove (14) is provided on the ring corresponding to the root of the plurality of cutting grooves (12).

3. The anti-loosening bolt assembly according to claim 1, wherein the bolt body (1) is provided with a bolt external thread (15) which is gradually narrowed from top to bottom at the lower part thereof, and a polish rod (16) is arranged between the bolt external thread (15) and the flange root of the bolt body (1).

4. The anti-loosening bolt assembly according to claim 1, characterized in that a first cylindrical cavity (17) and a second cylindrical cavity (18) are sequentially arranged in the bolt body (1) above the conical sinking groove (11) from bottom to top, and the upper part of the second cylindrical cavity (18) is provided with a bolt internal thread (181).

5. The anti-loosening bolt assembly according to claim 4, wherein the tension bolt (2) is provided with a guide rod (21) and an external threaded rod (22) from bottom to top in sequence, the guide rod (21) is slidably installed in the first cylindrical cavity (17), and the external threaded rod (22) is connected with the internal bolt thread (181) of the second cylindrical cavity (18) in a screwing manner.

6. The anti-loosening bolt assembly according to claim 1, wherein an installation sunken groove (19) is formed in the upper portion of the bolt body (1), four key grooves (191) are uniformly formed in the inner wall of the installation sunken groove (19), correspondingly, limiting clamping grooves (23) are radially formed in the top of the tensioning bolt (2), and the flat keys (4) are clamped in the key grooves (191) and the limiting clamping grooves (23) respectively.

7. The anti-loosening bolt assembly according to claim 6, wherein the inner wall of the installation sinking groove (19) is further provided with a plug internal thread (192), the limit plug (5) is a T-shaped plug, and the lower part of the T-shaped plug is screwed on the plug internal thread (192).

8. The anti-loosening bolt assembly according to any one of claims 1 to 6, wherein the top of the tension bolt (2) and the top of the limiting screw plug (5) are provided with inner hexagonal countersunk grooves (24).

9. The anti-loosening bolt assembly according to any one of claims 1 to 6, wherein a sealing ring (6) is further arranged between the limiting screw plug (5) and the bolt body (1).