CN216951224U

CN216951224U - Nut and screw assembly not easy to loosen and locking device

Info

Publication number: CN216951224U
Application number: CN202121874551.2U
Authority: CN
Inventors: 李博龙
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-08-11
Filing date: 2021-08-11
Publication date: 2022-07-12
Anticipated expiration: 2031-08-11

Abstract

The utility model provides a nut and screw assembly difficult to loosen and a locking device, wherein the nut and screw assembly difficult to loosen comprises a screw, a nut and a fastening screw; the screw rod comprises a screw rod cap and a rod body, the screw rod is matched with the nut to carry out conventional matching connection on a to-be-connected part, the screw rod penetrates through two objects to be connected firstly, then the nut is used for rotatably sleeving the screw rod to penetrate through the end parts of the two objects to be connected and screwing, then the fastening rod is rotatably inserted into the connecting hole until the first conical surface is completely attached to the wall of the tapered hole, at the moment, the conical protruding part of the first conical surface is pressed into the first inclined surface, the axis of the screw rod is changed due to the conical eccentricity of the fastening rod, the thread is tightly occluded, the screw rod cannot be convoluted and loosened, the whole screw rod and the nut cannot be convoluted due to the fact that the screw rod is in a mortise and tenon structure and the conical eccentricity are combined, and therefore, the to this set of device enables the objects to be connected, the nut and the screw rod to form a whole body, and the screw rod cannot be loosened no matter in any severe environment.

Description

Nut and screw assembly not easy to loosen and locking device

Technical Field

The utility model relates to the technical field of locking devices, in particular to a nut and screw rod assembly not easy to loosen and a locking device.

Background

The nut and the screw are parts for tightly connecting mechanical equipment, are meshed together through threads on the inner sides, and are connected together through the nut and the bolt with the same specification.

Nut, screw rod fastener are common fastener in many fields, but receive factors such as environment, weather, vibration after long-time the use, easily cause the nut not hard up, cause multiple accident, can cause serious loss for national manpower and materials when serious.

Disclosure of Invention

According to the technical problems, the utility model provides a nut and screw assembly and a locking device which are not easy to loosen, so as to solve the technical problems that the nut and screw fastener is easy to loosen due to factors such as environment, weather, vibration and the like after being used for a long time, and various accidents are caused.

In order to achieve the technical effects, the utility model adopts the following technical scheme:

the nut and screw assembly difficult to loosen and the locking device provided by the utility model have the advantages that the nut and screw assembly difficult to loosen comprises a screw, a nut and a fastening screw;

the screw comprises a screw cap and a rod body, the screw cap is fixedly connected with one end of the rod body, the other end of the rod body is provided with a connecting hole, a first internal thread is attached in the connecting hole, the bottom of the connecting hole is a conical surface, and a first external thread is arranged outside the rod body;

the fastening screw comprises an auxiliary nut and a fastening rod, a first conical surface is arranged at the joint of the nut and the fastening rod, the taper of the first conical surface is eccentric taper, a second external thread is arranged outside the fastening rod, the first external thread is meshed with the first internal thread, and the fastening rod is inserted into the connecting hole;

the nut is provided with an inner threaded hole, the inner threaded hole comprises a tapered hole and a threaded hole, the threaded hole is connected with the thinner end of the tapered hole, a second internal thread is arranged in the threaded hole, and the second internal thread is meshed with the first external thread;

the screw rod is inserted into the nut by the threaded hole end, the fastening screw rod is inserted into the nut by the tapered hole end, the fastening screw rod is screwed into the connecting hole, and the first conical surface is attached to the wall of the tapered hole.

Further, the first internal thread and the first external thread have opposite thread directions.

Further, the first internal thread is a left-handed fine thread, and the first external thread is a right-handed thread.

Further, the second external thread is a left-handed fine thread.

Further, the end face of the nut is in a regular hexagon shape.

Furthermore, the bottom of the connecting hole is a cone.

The utility model also provides a locking device which is characterized by comprising the nut and screw assembly which is not easy to loosen, and the gasket is arranged between the nut and a fastening object.

In summary, compared with the prior art, the beneficial technical effects of the utility model are as follows: the nut and screw assembly difficult to loosen and the locking device provided by the utility model have the advantages that the nut and screw assembly difficult to loosen comprises a screw, a nut and a fastening screw; the screw comprises a screw cap and a rod body, the screw cap is fixedly connected with one end of the rod body, the other end of the rod body is provided with a connecting hole, a first internal thread is attached in the connecting hole, the bottom of the connecting hole is a conical surface, and a first external thread is arranged outside the rod body; the fastening screw comprises an auxiliary nut and a fastening rod, a first conical surface is arranged at the joint of the nut and the fastening rod, a second external thread is arranged outside the fastening rod, the first external thread is meshed with the first internal thread, and the fastening rod is inserted into the connecting hole; the nut is provided with an inner threaded hole, the inner threaded hole comprises a tapered hole and a threaded hole, the threaded hole is connected with the thinner end of the tapered hole, a second internal thread is arranged in the threaded hole, and the second internal thread is meshed with the first external thread; the screw rod is inserted into the nut from the threaded hole end, the fastening screw rod is inserted into the nut from the tapered hole end, the fastening screw rod is screwed into the connecting hole, and the first inclined plane is attached to the tapered hole wall; when the device is used, a screw rod and a nut are matched to carry out conventional matching connection on a position to be connected, the screw rod penetrates through two objects to be connected, then the nut is screwed into the screw rod to penetrate through the ends of the two objects to be connected and is screwed, then the fastening rod is screwed into the connecting hole until the first conical surface is completely attached to the wall of the tapered hole, at the moment, the conical protruding part of the first conical surface is pressed into the first inclined surface, the conical eccentricity of the fastening rod changes the axis of the screw rod, threads are tightly occluded, so that the screw rod cannot be rotated and loosened, the whole body is in a mortise and tenon structure and is combined with the conical eccentricity so that the screw rod and the nut cannot be rotated, and therefore, the device enables the objects to be connected, the nut and the screw rod to form a whole body which cannot be loosened under any severe environment.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a nut and screw assembly not easy to loosen provided in embodiment 1.

Fig. 2 is a schematic view of a split structure of the locking device provided in embodiment 2.

Fig. 3 is a schematic structural view of the locking device provided in embodiment 2.

Icon: the screw-1, the screw cap-11, the rod-12, the nut-2, the tapered hole-21, the fastening screw-3, the nut-31, the fastening rod-32, the first conical surface-33, the gasket-4 and the fastening object-5.

The specific implementation mode is as follows:

example 1

As shown in the figure, the first and second,

according to the nut and screw assembly and the locking device which are not easy to loosen provided by the embodiment, the nut and screw assembly which is not easy to loosen comprises a screw 1, a nut 2 and a fastening screw 3; the screw 1 comprises a screw cap 11 and a rod body 12, the screw cap 11 is fixedly connected with one end of the rod body 12, the other end of the rod body 12 is provided with a connecting hole, a first internal thread is attached in the connecting hole, the bottom of the connecting hole is a conical surface, and a first external thread is arranged outside the rod body 12; the fastening screw rod 1 comprises an auxiliary nut 31 and a fastening rod 32, a first conical surface 33 is arranged at the joint of the nut 31 and the fastening rod 32, the taper of the first conical surface 33 is an eccentric taper, a second external thread is arranged outside the fastening rod 32, the first external thread is meshed with the first internal thread, and the fastening rod 32 is inserted into the connecting hole; the nut 2 is provided with an inner threaded hole which comprises a tapered hole 21 and a threaded hole, the threaded hole is connected with the thinner end of the tapered hole 21, a second inner thread is arranged in the threaded hole, and the second inner thread is meshed with the first outer thread; the screw 1 is inserted into the nut 2 from the threaded hole end, the fastening screw 1 is inserted into the nut 2 from the tapered hole 21 end, the fastening screw 3 is screwed into the connecting hole, and the first conical surface 33 is attached to the wall of the tapered hole 21.

When the connecting device is used, a screw rod 1 and a nut 2 are matched to carry out conventional matching connection on a position to be connected, the screw rod 1 penetrates into two objects to be connected, then the nut 2 is used for rotatably sleeving the screw rod 1 to penetrate through the two object ends to be connected and screwing, then a fastening rod 32 is rotatably inserted into a connecting hole until a first conical surface 33 is completely attached to the hole wall of a tapered hole 21, at the moment, a conical protruding part of the first conical surface 33 is pressed into a first inclined surface, the conical eccentricity of the fastening rod 32 changes the axis of the screw rod 1, threads are tightly meshed, the screw rod 1 cannot be rotated and loosened, and the whole structure in a mortise and tenon mode is combined with the conical eccentricity so that the screw rod 1 and the nut 2 cannot be rotated.

The thread directions of the first internal thread and the first external thread can be the same direction or opposite directions, and when the two thread directions are the same, the first external thread is meshed with the nut 2, and the fastening screw 3 and the screw 1 are screwed, because the thread directions of the first internal thread and the first external thread are opposite, the screwing degree of the screw 1 and the nut 2 can be gradually increased in the screwing process of the fastening rod 32 and the screw 1, and the screw 1 and the nut 2 are more tightly connected.

In this embodiment, the first internal thread has a thread direction opposite to that of the first external thread.

When carrying out swivelling joint to fastening screw 3 and screw rod 1, need fix 2 lines of nut, carry out swivelling joint to fastening screw 3 and screw rod 1 afterwards, loosening nut 2 after fastening screw 3 is connected with screw rod 1, the integral connection is accomplished, this connected mode is behind the integral connection, it is comparatively convenient when changing single part, the direction is different between each screw thread, the difficult situation of wrong atress that takes place, can not be excessive because of the installation of screw rod 1 with fastening screw rod 3 between nut 2 and screw rod 1.

In this embodiment, the first internal thread is a left-handed fine thread, and the first external thread is a right-handed thread.

The internal thread adopts fine thread, and the lead angle of fine tooth is littleer, more does benefit to the auto-lock of screw thread to fine thread pitch is little, and on the same thread length, the tooth number of screw in is more, can play the effect that reduces the fluid and reveal, has liquid to get into in the subassembly when avoiding long-time the use.

In this embodiment, the second external thread is a left-handed fine thread.

In this embodiment, the thicknesses of the first internal thread, the first external thread, the first internal thread and the second external thread may be determined according to actual use requirements.

Wherein, the nut 31 can adopt a word and cross nut 31, also can adopt the terminal surface to be regular hexagon's nut 31, if adopt a word and cross nut 31, very convenient in the installation, but more be applicable to small-size screw rod 1.

In the present embodiment, the end surface of the nut 31 is a regular hexagon.

Regular hexagon's nut 31 needs to adopt the spanner to fasten 1 line of screw rod when the installation, and when whole size is great, regular hexagon's nut 31 is comparatively firm, and the spanner installation makes the installer be convenient for the afterburning, can carry out comparatively firm locking to the whole.

And, the hole bottom of the connecting hole can be a flat structure, also can be the cone structure, when it is a flat structure, require the precision of connecting hole and fastening screw 3 to be higher, after fastening screw 3 inserts into the connecting hole completely, the space that leaves is less at the bottom of fastening screw 3 and the connecting hole bottom, if the space that leaves is too big, can lead to fastening screw 3 and screw 1 between be connected not firm enough.

In this embodiment, the bottom of the connecting hole is a cone.

After the fastening screw rod 3 is completely inserted, the force can be continuously applied to ensure that the bottom end part of the fastening screw rod 3 enters the cone cavity at the bottom of the hole of the connecting hole, at the moment, the cone side wall extrudes the fastening screw rod 3 to generate an acting force which enables the fastening screw rod 3 to rotate in the opposite direction, and the fastening screw rod 3 rotates under the stress to strengthen the connection between the screw rod 1 and the nut 2, so that the whole body is firmer.

In the present embodiment, the material of the screw 1, the nut 2, and the fastening screw 3 is 45# steel or S400. In other embodiments, the materials may be selected based on customer needs.

Example 2

The locking device provided by this embodiment includes the nut and screw assembly that is not easily loosened and the spacer 4 is disposed between the nut 2 and the fastening object 5 provided in embodiment 1.

In treating to connect the article and connect the fastening in-process, press from both sides gasket 4 and locate nut 2 and fastening article 5 within a definite time, gasket 4 can avoid nut 2 and article direct contact, scotch the article surface in nut 2 installation, lead to damaging with article exposure article surface coating paint to make and meet and be in easily getting rusty, corroding in long-time use with article, influence life.

In this embodiment, the material of the gasket 4 is 45# steel or S400.

In the description of the present application, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", "rear", and the like, are used in the orientations and positional relationships indicated in the drawings only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and encompass, for example, both fixed and removable connections or integral parts thereof; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily make changes or variations within the technical scope of the present invention disclosed, and such changes or variations should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims. The technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the utility model not be limited to the particular embodiments disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.

Claims

1. The nut and screw assembly difficult to loosen is characterized by comprising a screw (1), a nut (2) and a fastening screw (3);

the screw (1) comprises a screw cap (11) and a rod body (12), the screw cap (11) is fixedly connected with one end of the rod body (12), a connecting hole is formed in the other end of the rod body (12), a first internal thread is attached to the inside of the connecting hole, the bottom of the connecting hole is a conical surface, and a first external thread is arranged outside the rod body (12);

the fastening screw rod (1) comprises a nut (31) and a fastening rod (32), a first conical surface (33) is arranged at the joint of the nut (31) and the fastening rod (32), the taper of the first conical surface (33) is an eccentric taper, a second external thread is arranged outside the fastening rod (32), the first external thread is meshed with the first internal thread, and the fastening rod (32) is inserted into the connecting hole;

the nut (2) is provided with an inner threaded hole, the inner threaded hole comprises a tapered hole (21) and a threaded hole, the threaded hole is connected with the thinner end of the tapered hole (21), a second internal thread is arranged in the threaded hole, and the second internal thread is meshed with the first external thread;

screw rod (1) by the screw hole end inserts into nut (2), fastening screw rod (1) is inserted into by gradually pore (21) end in nut (2), just fastening screw rod (3) screw in the connecting hole, first conical surface (33) with gradually pore (21) pore wall laminating.

2. The non-loosening nut and screw assembly of claim 1, wherein the first internal thread is threaded in an opposite direction to the first external thread.

3. The non-loosening nut and screw assembly according to claim 2, wherein the first internal thread is a left-handed fine thread and the first external thread is a right-handed thread.

4. The non-loosening nut and screw assembly of claim 3, wherein the second external thread is a left-handed fine thread.

5. A non-loosening nut and screw assembly according to claim 1, wherein the end surface of the nut (31) is regular hexagonal.

6. The non-loosening nut and screw assembly according to claim 1, wherein the bottom of the attachment hole is tapered.

7. Locking device, characterized in that it comprises a shim (4) and a non-loose nut-screw assembly according to any of claims 1-6, said shim (4) being arranged between said nut (2) and the fastening object (5).