CN113606240A

CN113606240A - Connecting structure not easy to loosen

Info

Publication number: CN113606240A
Application number: CN202110925472.8A
Authority: CN
Inventors: 刘伟明
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-08-12
Filing date: 2021-08-12
Publication date: 2021-11-05

Abstract

The invention provides a connecting structure not easy to loosen, and relates to the technical field of connecting structures. A connecting structure not easy to loosen comprises a bolt, a nut, a first connecting block, a second connecting block and a limiting block; the bolt comprises a head and a screw rod which are connected with each other; the first connecting block is provided with a first through hole, the second connecting block is provided with a second through hole, and one end of the screw rod, which is far away from the head, sequentially penetrates through the first through hole, the second through hole and the nut; the limiting block is arranged on the second connecting block; the nut locking device further comprises a locking piece used for preventing the nut from rotating relative to the limiting block, and the locking piece is detachably connected with the nut and the limiting block respectively. By adopting the invention, the nut and the bolt can not be loosened during vibration, the connection is stable, and the installation and the disassembly are convenient.

Description

Connecting structure not easy to loosen

Technical Field

The invention relates to the technical field of connecting structures, in particular to a connecting structure not easy to loosen.

Background

A bolt is a mechanical part, and a cylindrical threaded fastener matched with a nut. A fastener consisting of a head part and a screw (a cylinder with external threads) needs to be matched with a nut and is used for fastening and connecting two parts with through holes. This form of connection is known as a bolted connection. If the nut is unscrewed from the bolt, the two parts can be separated, so that the bolt connection belongs to detachable connection.

The bolts are divided according to the stress mode of connection: both plain and reamed. According to the shape of the head: hexagonal, round, square, countersunk, etc. With a hex head being the most common. A countersunk head is typically used where attachment is desired. The bolt is divided into two types of coarse thread and fine thread according to the thread type, and the coarse thread type is not shown in the mark of the bolt. The bolts are divided into eight grades of 3.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9 and 12.9 according to performance grades, wherein the bolts above 8.8 (including 8.8) are made of low-carbon alloy steel or medium-carbon steel and are subjected to heat treatment (quenching and tempering), and are generally called high-strength bolts, and the bolts below 8.8 (not including 8.8) are generally called ordinary bolts.

The common bolt can be classified into A, B, C grades according to the manufacturing accuracy, wherein A, B grade is refined bolt, and C grade is rough bolt. The connecting bolt for the steel structure is generally a common rough C-grade bolt except for special indication. The different processing methods of different grades have differences, and the corresponding processing modes are generally as follows: firstly, a bolt rod of an A, B-grade bolt is machined by a lathe, the surface is smooth, the size is accurate, the performance grade of the material is 8.8 grade, the manufacturing and the installation are complex, the price is high, and the bolt rod is rarely adopted; secondly, the C-grade bolt is made of unprocessed round steel, the size is not accurate enough, and the performance grade of the material is 4.6 grade or 4.8 grade. The deformation is big during the connection that shears, but simple to operate, low in production cost is used for the tensile to connect or the temporary fixation when installing more.

When two objects are connected through a bolt and a nut, the two objects are directly clamped between the head of the bolt and the nut, and the two objects are prevented from being separated. However, under the conditions of vibration and the like, the nut still can rotate along the screw rod, so that the nut and the bolt are loosened, and the stability of connection is affected. The nut can be dropped after a long time.

Disclosure of Invention

The invention aims to provide a connecting structure which is not easy to loosen, can not cause loosening of nuts and bolts during vibration, is stable in connection and is convenient to mount and dismount.

The embodiment of the invention is realized by the following steps:

the embodiment of the application provides a connecting structure which is not easy to loosen, and the connecting structure comprises a bolt, a nut, a first connecting block, a second connecting block and a limiting block; the bolt comprises a head and a screw rod which are connected with each other; the first connecting block is provided with a first through hole, the second connecting block is provided with a second through hole, and one end of the screw rod, which is far away from the head, sequentially penetrates through the first through hole, the second through hole and the nut; the limiting block is arranged on the second connecting block; the nut locking device further comprises a locking piece used for preventing the nut from rotating relative to the limiting block, and the locking piece is detachably connected with the nut and the limiting block respectively.

Further, in some embodiments of the present invention, the stopper is detachably connected to the second connecting block.

Further, in some embodiments of the present invention, the limiting block is provided with a third through hole, the screw rod passes through the third through hole, and the limiting block is located between the nut and the second connecting block; the limiting block is provided with a clamping lug, and one end of the second connecting block, which is close to the limiting block, is provided with a clamping groove matched with the clamping lug; the clamping convex block is embedded into the clamping groove.

Further, in some embodiments of the present invention, the number of the clamping protrusions and the number of the clamping grooves are two, and the two clamping protrusions and the two clamping grooves are disposed opposite to each other.

Further, in some embodiments of the present invention, a cross section of the outer sidewall of the nut is polygonal, and a cross section of the outer sidewall of the stop block is the same as a cross section of the outer sidewall of the nut; the locking piece is provided with a clamping hole, and the cross section of the clamping hole is the same as that of the outer side wall of the nut; the locking piece is respectively sleeved on the outer side wall of the nut and the outer side wall of the limiting block.

Further, in some embodiments of the present invention, the cross-section of the outer sidewall of the nut is a regular hexagon.

Further, in some embodiments of the present invention, an elastic pad is disposed between the nut and the stopper, and the elastic pad abuts against the nut and the stopper, respectively.

Further, in some embodiments of the present invention, the elastic pad is a spring washer.

Further, in some embodiments of the present invention, the cross section of the outer sidewall of the head portion is a polygon, and the first connecting block is provided with a slot engaged with the head portion; the head is embedded in the clamping groove.

Further, in some embodiments of the present invention, the cross-section of the outer sidewall of the head portion is a regular hexagon.

Compared with the prior art, the embodiment of the invention at least has the following advantages or beneficial effects:

the embodiment of the invention provides a connecting structure not easy to loosen, which comprises a bolt, a nut, a first connecting block, a second connecting block and a limiting block, wherein the first connecting block is fixedly connected with the bolt; the bolt comprises a head and a screw rod which are connected with each other; the first connecting block is provided with a first through hole, the second connecting block is provided with a second through hole, and one end of the screw rod, which is far away from the head, sequentially penetrates through the first through hole, the second through hole and the nut; the limiting block is arranged on the second connecting block; the nut locking device further comprises a locking piece used for preventing the nut from rotating relative to the limiting block, and the locking piece is detachably connected with the nut and the limiting block respectively.

When the connecting device is actually used, the first connecting block and the second connecting block can be fixed on two objects to be connected, the first connecting block is fixed on one object, and the second connecting block is fixed on the other object; then the one end of keeping away from above-mentioned head through the screw rod passes above-mentioned first through-hole, above-mentioned second through-hole and above-mentioned nut in proper order, so fix first connecting block and second connecting block joint between head and nut.

The limiting block is arranged on the second connecting block; the locking piece is detachably connected with the nut and the limiting block respectively, the nut is prevented from rotating relative to the limiting block through the locking piece, the nut is prevented from rotating relative to the second connecting block, the nut and the bolt cannot be loosened during vibration, the first connecting block and the second connecting block are fixed and stable, and then the two objects are connected stably and are convenient to install and detach.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a front view of a connection provided by an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a connection structure provided in accordance with an embodiment of the present invention;

fig. 3 is an exploded view of a connection structure provided in an embodiment of the present invention.

Icon: 1-a nut; 2-a head; 3-a screw; 4-a first connection block; 5-a first via; 6-a second connecting block; 7-a second via; 8-a lock; 9-a limiting block; 10-a third via; 11-a snap-fit projection; 12-a clamping groove; 13-a clamping hole; 14-an elastic pad; 15-card slot.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without any inventive step, are within the scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are usually placed in when used, the orientations or positional relationships are only used for convenience of describing the present invention and simplifying the description, but the terms do not indicate or imply that the devices or elements indicated must have specific orientations, be constructed in specific orientations, and operate, and therefore, should not be construed as limiting the present invention. Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not require that the components be absolutely horizontal or vertical, but may be slightly inclined. Such as "horizontal" simply means that its orientation is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed" and "connected" should be interpreted broadly, and may be, for example, 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 meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Examples

Referring to fig. 1 to 3, fig. 1 is a front view of a connection structure according to an embodiment of the invention; FIG. 2 is a cross-sectional view of a connection structure provided in an embodiment of the present invention; fig. 3 is an exploded view of a connection structure according to an embodiment of the present invention.

The embodiment provides a connecting structure which is not easy to loosen, and the connecting structure comprises a bolt, a nut 1, a first connecting block 4, a second connecting block 6 and a limiting block 9; the bolt comprises a head 2 and a screw 3 which are connected with each other; the first connecting block 4 is provided with a first through hole 5, the second connecting block 6 is provided with a second through hole 7, and one end of the screw rod 3, which is far away from the head 2, sequentially penetrates through the first through hole 5, the second through hole 7 and the nut 1; the limiting block 9 is arranged on the second connecting block 6; the nut locking device further comprises a locking piece 8 used for preventing the nut 1 from rotating relative to the limiting block 9, and the locking piece 8 is detachably connected with the nut 1 and the limiting block 9 respectively.

In practical use, the first connecting block 4 and the second connecting block 6 can be fixed on two objects to be connected, the first connecting block 4 is fixed on one object, and the second connecting block 6 is fixed on the other object; then, one end of the screw rod 3 far away from the head 2 sequentially penetrates through the first through hole 5, the second through hole 7 and the nut 1, and the first connecting block 4 and the second connecting block 6 are clamped between the head 2 and the nut 1 to be fixed. The limiting block 9 is arranged on the second connecting block 6; above-mentioned lock piece 8 can dismantle with above-mentioned nut 1 and above-mentioned stopper 9 respectively and be connected, so prevent through lock piece 8 that above-mentioned nut 1 from rotating for above-mentioned stopper 9, and then prevented that nut 1 from rotating for second connecting block 6, so can not cause nut 1 and bolt not hard up when the vibration, make first connecting block 4 and second connecting block 6 fixed stable, and then make two objects connect stably, be convenient for installation and dismantlement.

Alternatively, the first connecting block 4 and the second connecting block 6 of the present embodiment may be made of a metal material, and the first connecting block 4 and the second connecting block 6 may be respectively fixed to two objects to be connected by welding.

As shown in fig. 1 to 3, in some embodiments of the present invention, the stopper 9 is detachably connected to the second connecting block 6.

The limiting block 9 is detachably connected with the second connecting block 6, so that the limiting block 9 is conveniently arranged on the second connecting block 6, the limiting block 9 is conveniently taken down from the second connecting block 6, and the operation is convenient.

As shown in fig. 1-3, in some embodiments of the present invention, the stopper 9 is provided with a third through hole 10, the screw 3 passes through the third through hole 10, and the stopper 9 is located between the nut 1 and the second connecting block 6; the limiting block 9 is provided with a clamping convex block 11, and one end of the second connecting block 6 close to the limiting block 9 is provided with a clamping groove 12 matched with the clamping convex block 11; the engaging protrusion 11 is inserted into the engaging groove 12.

According to the invention, the third through hole 10 is formed through the limiting block 9, so that the screw rod 3 can conveniently pass through the third through hole 10, and the limiting block 9 is positioned between the nut 1 and the second connecting block 6; the limiting block 9 is provided with a clamping convex block 11, and one end of the second connecting block 6 close to the limiting block 9 is provided with a clamping groove 12 matched with the clamping convex block 11; so when installing stopper 9, will locate screw rod 3 with stopper 9 cover earlier outside, joint lug 11 aims at above-mentioned joint groove 12, then removes stopper 9, makes above-mentioned joint lug 11 imbed and realizes the joint in above-mentioned joint groove 12, and joint lug 11 can not rotate along second connecting block 6 this moment, has prevented that stopper 9 from rotating for second connecting block 6, and this moment is under the locking of locking piece 8, and nut 1 can not rotate for second connecting block 6. So can not cause nut 1 and bolt not hard up when the vibration, make first connecting

block

4 and 6 fixed stabilities of second connecting block, and then make two objects connect stably, be convenient for installation and dismantlement.

As shown in fig. 1 to 3, in some embodiments of the present invention, the number of the clamping protrusions 11 and the clamping grooves 12 is two, and the two clamping protrusions 11 and the two clamping grooves 12 are disposed opposite to each other.

According to the invention, the number of the clamping convex blocks 11 and the clamping grooves 12 is two, the two clamping convex blocks 11 and the two clamping grooves 12 are arranged oppositely, so that the two clamping convex blocks 11 are clamped and fixed at the same time, and the stability of the clamping convex blocks 11 after clamping is improved.

As shown in fig. 1-3, in some embodiments of the present invention, the cross section of the outer sidewall of the nut 1 is polygonal, and the cross section of the outer sidewall of the stop block 9 is the same as the cross section of the outer sidewall of the nut 1; the locking piece 8 is provided with a clamping hole 13, and the cross section of the clamping hole 13 is the same as that of the outer side wall of the nut 1; the locking member 8 is respectively sleeved on the outer side wall of the nut 1 and the outer side wall of the limiting block 9.

According to the invention, the cross section of the outer side wall of the nut 1 is polygonal, and the cross section of the outer side wall of the limiting block 9 is the same as that of the outer side wall of the nut 1; the locking piece 8 is provided with a clamping hole 13, and the cross section of the clamping hole 13 is the same as that of the outer side wall of the nut 1; so after installing stopper 9 and nut 1, locate the lateral wall of above-mentioned nut 1 and the lateral wall of above-mentioned stopper 9 through above-mentioned locking piece 8 cover respectively, so carry out the locking to nut 1 and stopper 9, prevented that nut 1 from rotating for stopper 9, so can not cause nut 1 and bolt not hard up when the vibration, make first connecting block 4 and second connecting block 6 fixed stable, and then make two objects connect stably, be convenient for installation and dismantlement. And the locking piece 8 can be conveniently taken out from the outer side wall of the nut 1 and the outer side wall of the limiting block 9, so that the disassembly is convenient.

As shown in fig. 1 to 3, in some embodiments of the present invention, the cross-section of the outer sidewall of the nut 1 is a regular hexagon. According to the invention, the cross section of the outer side wall of the nut 1 is regular hexagon, and the regular hexagon nut 1 is convenient to manufacture and use, so that the locking piece 8 is convenient to mount. It should be noted that the cross section of the outer side wall of the nut 1 is a regular hexagon, which is only a preferred embodiment of the present invention, and the present invention is not limited thereto, and in other embodiments, the cross section of the outer side wall of the nut 1 may also be other polygons, such as a quadrangle, a pentagon, etc.

As shown in fig. 1-3, in some embodiments of the present invention, an elastic pad 14 is disposed between the nut 1 and the stopper 9, and the elastic pad 14 abuts against the nut 1 and the stopper 9, respectively.

Because the cross section of the outer side wall of the nut 1 is polygonal, when the locking piece 8 is arranged on the outer side wall of the nut 1 and the outer side wall of the limiting block 9 in a sleeved mode, the outer side wall of the nut 1 and the outer side wall of the limiting block 9 need to be aligned, the plane of the outer side wall of the nut 1 is aligned to the plane of the outer side wall of the limiting block 9, and the edge of the outer side wall of the nut 1 is aligned to the edge of the outer side wall of the limiting block 9.

According to the invention, the elastic cushion 14 is arranged between the nut 1 and the limiting block 9, the elastic cushion 14 is respectively abutted against the nut 1 and the limiting block 9, so that the elastic cushion 14 can be compressed to deform, and in the process of rotating the nut 1 to align the limiting block 9, the elastic cushion 14 can deform to facilitate the rotation of the nut 1, further facilitate the alignment of the nut 1 to the limiting block 9, and further facilitate the sleeving of the locking piece 8.

As shown in fig. 1-3, in some embodiments of the present invention, the resilient pad 14 is a spring washer. The spring washer is widely applied to bearing and non-bearing structures of common mechanical products, and has the characteristics of low cost, convenient installation and suitability for parts with frequent assembly and disassembly. The spring washer can play locking, increase the function of pretightning force, and it can be used for increasing the fastening area of contact, prevents the friction of bolt and work piece, and the surface of protection connecting piece prevents fish tail work piece surface when bolt and nut 1 are screwed up. According to the invention, the elastic pad 14 is a spring washer, so that the nut 1 can rotate conveniently due to the deformation of the spring washer, and the spring washer can play a role in preventing looseness and increasing pretightening force.

As shown in fig. 1 to 3, in some embodiments of the present invention, the cross-section of the outer side wall of the head 2 is polygonal, and the first connecting block 4 is provided with a locking groove 15 engaged with the head 2; the head 2 is fitted into the engaging groove 15.

According to the invention, the cross section of the outer side wall of the head part 2 is polygonal, and the first connecting block 4 is provided with a clamping groove 15 matched with the head part 2; above-mentioned head 2 imbeds above-mentioned draw-in groove 15, so behind the head 2 embedding above-mentioned draw-in groove 15 of bolt, the head 2 of bolt can not rotate along first connecting block 4, because nut 1 can not rotate along first connecting block 4, so around cooperate together, bolt and nut 1 can not rotate, further improve the stability of connecting, prevented that the vibration from causing nut 1 and bolt not hard up.

In some embodiments of the invention, as shown in fig. 1-3, the cross-section of the outer side wall of the head 2 is a regular hexagon. According to the invention, the cross section of the outer side wall of the head part 2 is regular hexagon, so that the bolt is convenient to manufacture and use. It should be noted that the cross section of the outer side wall of the head 2 is a regular hexagon, which is only a preferred embodiment of the present invention, and the present invention is not limited thereto, and in other embodiments, the cross section of the outer side wall of the head 2 may also be other polygons, such as a quadrangle, a pentagon, etc.

In summary, the embodiment of the present invention provides a connection structure that is not easy to loosen, including a bolt, a nut 1, a first connection block 4, a second connection block 6, and a limit block 9; the bolt comprises a head 2 and a screw 3 which are connected with each other; the first connecting block 4 is provided with a first through hole 5, the second connecting block 6 is provided with a second through hole 7, and one end of the screw rod 3, which is far away from the head 2, sequentially penetrates through the first through hole 5, the second through hole 7 and the nut 1; the limiting block 9 is arranged on the second connecting block 6; the nut locking device further comprises a locking piece 8 used for preventing the nut 1 from rotating relative to the limiting block 9, and the locking piece 8 is detachably connected with the nut 1 and the limiting block 9 respectively.

While the present invention has been described with reference to the preferred embodiments, it is to be understood that the invention is not limited to the details of the foregoing illustrative embodiments, and that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a connection structure that is difficult for pine to take off which characterized in that: the device comprises a bolt, a nut, a first connecting block, a second connecting block and a limiting block; the bolt comprises a head and a screw which are connected with each other; the first connecting block is provided with a first through hole, the second connecting block is provided with a second through hole, and one end of the screw rod, which is far away from the head, sequentially penetrates through the first through hole, the second through hole and the nut; the limiting block is arranged on the second connecting block; the nut is further prevented from rotating relative to the limiting block, and the locking piece is detachably connected with the nut and the limiting block respectively.

2. The connection structure not liable to come loose according to claim 1, characterized in that: the limiting block is detachably connected with the second connecting block.

3. The non-releasable connecting structure according to claim 2, wherein: the limiting block is provided with a third through hole, the screw penetrates through the third through hole, and the limiting block is positioned between the nut and the second connecting block; the limiting block is provided with a clamping lug, and one end, close to the limiting block, of the second connecting block is provided with a clamping groove matched with the clamping lug; the clamping convex block is embedded into the clamping groove.

4. The non-releasable connecting structure according to claim 3, wherein: the clamping lug with the quantity in joint groove is two, two the clamping lug with two the joint groove all sets up relatively.

5. The non-releasable connecting structure according to claim 3, wherein: the cross section of the outer side wall of the nut is polygonal, and the cross section of the outer side wall of the limiting block is the same as that of the outer side wall of the nut; the locking piece is provided with a clamping hole, and the cross section of the clamping hole is the same as that of the outer side wall of the nut; the locking piece is respectively sleeved on the outer side wall of the nut and the outer side wall of the limiting block.

6. The non-releasable connecting structure according to claim 5, wherein: the cross section of the outer side wall of the nut is a regular hexagon.

7. The non-releasable connecting structure according to claim 5, wherein: the nut with be equipped with the cushion between the stopper, the cushion respectively with the nut and the stopper butt.

8. The non-releasable connecting structure according to claim 7, wherein: the elastic pad is a spring washer.

9. The connection structure not liable to come loose according to claim 1, characterized in that: the cross section of the outer side wall of the head part is a polygon, and the first connecting block is provided with a clamping groove matched with the head part; the head is embedded in the clamping groove.

10. The connection structure of claim 9, wherein: the cross section of the outer side wall of the head part is a regular hexagon.