CN218817527U

CN218817527U - Anti-loose lock nut assembly with wedge-shaped structure

Info

Publication number: CN218817527U
Application number: CN202223053903.5U
Authority: CN
Inventors: 曹武; 李小波
Original assignee: Hunan Shenyi Precision Parts Co ltd
Current assignee: Hunan Shenyi Precision Parts Co ltd
Priority date: 2022-11-16
Filing date: 2022-11-16
Publication date: 2023-04-07
Anticipated expiration: 2032-11-16

Abstract

The embodiment of the application discloses locking nut subassembly of wedge structure includes: the outer peripheral wall of the screw is provided with an external thread; the nut is provided with an internal thread matched with the screw rod, is in threaded connection with the screw rod and is provided with a first end and a second end which are oppositely arranged; the end face of the first end is provided with helical teeth, and the helical teeth are provided with first inclined planes; a tooth groove matched with the helical tooth is formed in one end, facing the nut, of the washer, and the tooth groove is provided with a second inclined plane attached to the first inclined plane; wherein the first end of nut is equipped with the riveting portion of card income packing ring hole, and nut and packing ring ability relative rotation. According to the embodiment of the application, the riveting part is clamped into the inner hole of the washer, the nut and the washer are connected into a whole, the nut and the washer are more conveniently installed as a component, and the relative rotation of the nut and the washer is not influenced; and the cooperation of the helical teeth and the tooth grooves, the first inclined plane and the second inclined plane is utilized, so that when the nut is rotated and loosened, an axial acting force can be generated, axial pressure is generated, the rotating friction force is improved, and the anti-loosening effect is improved.

Description

Anti-loose lock nut assembly with wedge-shaped structure

Technical Field

The embodiment of the application relates to the field of fasteners, in particular to a wedge-shaped structure anti-loose lock nut assembly.

Background

Nuts are widely used in equipment in various industries as important connecting pieces.

In the use process, the nut may loosen, so that the equipment connection is unstable, and potential safety hazards are easy to occur. For this reason, there are nut anti-loosening arrangements available on the market.

However, the existing nut has a single anti-loosening form, and has poor anti-loosening effect or is inconvenient to use.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a wedge-shaped anti-loose lock nut assembly, which is used for solving at least one of the technical problems.

The embodiment of the application is realized by the following technical scheme: a wedge structured locknut assembly comprising: the outer peripheral wall of the screw is provided with an external thread; the nut is provided with an internal thread matched with the screw rod, is in threaded connection with the screw rod and is provided with a first end and a second end which are oppositely arranged; the end face of the first end is provided with helical teeth, and the helical teeth are provided with first inclined planes; a tooth groove matched with the helical teeth is formed in one end, facing the nut, of the washer, and the tooth groove is provided with a second inclined plane attached to the first inclined plane; the first end of the nut is provided with a riveting part clamped into the inner hole of the washer, and the nut and the washer can rotate relatively.

Furthermore, the included angle between the first inclined surface and the cross section of the nut and the included angle between the second inclined surface and the cross section of the nut are larger than the helix angle of the external thread of the screw.

Furthermore, riveting portion is the form of expanding outward, the packing ring is equipped with the screens hole with riveting portion adaptation, the screens hole is the form of narrowing towards the nut, just riveting portion expands outward the end size and is greater than the narrow end in screens hole.

Furthermore, one end of the washer, which faces away from the nut, is provided with friction convex teeth.

Furthermore, one end of the washer, which is back to the nut, is provided with an outward expansion part which is radially expanded outwards, and the friction convex teeth are arranged on the end surface of the outward expansion part.

Further, the end face of the second end of the nut is provided with a pressure point groove.

Furthermore, the nut further comprises a compression threaded sleeve, the compression threaded sleeve is in threaded connection with the screw, and the compression threaded sleeve is provided with a compression surface which is abutted against the end surface of the second end of the nut.

Furthermore, the periphery of the compression screw sleeve is provided with an extension cylinder extending towards the gasket, and the extension cylinder is abutted to the gasket.

Further, the inner hole of the extension cylinder has a gap with the peripheral wall of the nut.

Further, the peripheral wall of the extending cylinder is provided with a plurality of screwing planes distributed along the circumferential direction.

The beneficial effects are that:

compared with the prior art, the anti-loose lock nut assembly with the wedge-shaped structure is clamped into the inner hole of the washer through the riveting part, the nut and the washer are connected into a whole, the assembly is more convenient to mount as one assembly, and the relative rotation of the nut and the washer is not influenced; and the cooperation of the helical teeth and the tooth grooves, the first inclined plane and the second inclined plane is utilized, so that when the nut is rotated and loosened, an axial acting force can be generated, axial pressure is generated, the rotating friction force is improved, and the anti-loosening effect is improved.

Drawings

The following detailed description of embodiments of the present application is provided in conjunction with the appended drawings, wherein:

FIG. 1 is a schematic structural view of a wedge-structured anti-loose lock nut assembly according to an embodiment of the present application;

FIG. 2 is an enlarged view at C of FIG. 1;

FIG. 3 is a schematic view of a nut and washer connection;

FIG. 4 is an internal cross-sectional view of the nut and washer;

FIG. 5 is a cross-sectional view of another embodiment of the present application;

fig. 6 is a cross-sectional view of the compression nut of fig. 5.

Detailed Description

In order to make those skilled in the art better understand the technical solutions of the embodiments of the present application, the embodiments of the present application are described in detail below with reference to the drawings, and the description in this section is only exemplary and explanatory, and should not have any limiting effect on the scope of the embodiments of the present application.

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.

It should be noted that 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 a product of the embodiments of the present application is usually placed in when used, and are only used for convenience of describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the device or element to be referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," "third," and the like 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", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction 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 application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed 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. Specific meanings of the above terms in the embodiments of the present application can be understood as specific cases by those of ordinary skill in the art.

As shown in fig. 1 to 4, an anti-loose lock nut assembly of a wedge structure includes a screw 100, a nut 200, and a washer 300.

The outer peripheral wall of the screw 100 is provided with external threads; the nut 200 is provided with an internal thread adapted to the screw 100 and is in threaded connection with the screw 100, the nut 200 has a first end and a second end which are oppositely arranged, as shown in fig. 1, the first end is a lower end of the nut 200, and the second end is an upper end of the nut; the end face of the first end is provided with helical teeth 210, the helical teeth 210 have a first inclined surface 211, and the nut 200 is screwed downwards to match the bolt head on the screw 100 to clamp the carrier. One end (upper end) of the washer 300 facing the nut 200 is provided with a tooth groove 310 matched with the helical teeth 210, and the tooth groove 310 is provided with a second inclined surface 311 attached to the first inclined surface 211; the first end of the nut 200 is provided with a riveting portion 220 which is clamped into the inner hole of the washer 300, and the nut 200 and the washer 300 can rotate relatively.

According to the anti-loose locking nut assembly with the wedge-shaped structure, the riveting part 220 is clamped into the inner hole of the washer 300, the nut 200 and the washer 300 are connected into a whole, the nut assembly is more convenient to mount as an assembly, and the relative rotation of the nut 200 and the washer 300 is not influenced; and then, by utilizing the matching action of the helical teeth 210 and the tooth grooves 310 and the first inclined plane 211 and the second inclined plane 311, when the nut is rotated and loosened, axial acting force can be generated, so that axial pressure is generated, pre-tightening is realized, the anti-loosening effect is improved, and the nut can be applied to occasions of high-speed rotation and high-frequency vibration.

In a possible embodiment, the included angle B between the first inclined surface 211 and the second inclined surface 311 and the cross section of the nut 200 is greater than the helix angle a of the external thread of the screw 100, so that when the nut is rotated and loosened, the axial moving distance generated by the action of the first inclined surface 211 and the second inclined surface 311 is greater than the precession distance generated by the thread precession, and the distance difference causes greater axial interference and pressure to be generated when the nut is rotated and loosened, thereby generating greater pretightening force and preventing the nut from being loosened.

Referring to fig. 4, in a possible embodiment, the riveting portion 220 is outwardly expanded, the gasket 300 is provided with a clamping hole 320 adapted to the riveting portion 220, the clamping hole 320 is narrowed toward the nut 200, and the dimension of the outwardly expanded end of the riveting portion 220 is larger than the narrowed end of the clamping hole 320, so that riveting is realized through the riveting portion 220 and the clamping hole 320, and the nut 200 and the gasket 300 are connected into a whole, thereby facilitating installation of the whole; it can be understood that, the relative rotation of the nut 200 and the washer 300 is not affected after the riveting portion 220 is clamped into the clamping hole 320, and in order to leave a certain axial moving space between the nut 200 and the washer 300, the riveting portion 220 can also perform axial movement in a certain range in the clamping hole 320, the clamping hole 320 only performs axial movement limiting on the riveting portion 220, and does not perform axial fixing on the riveting portion 220, so that the effects of the first inclined surface 211 and the second inclined surface 311 are not affected.

In one possible embodiment, the end of the washer 300 facing away from the nut 200 is provided with a friction protrusion 330 to improve the contact friction with the clamped carrier and improve the anti-loosening effect.

In a possible embodiment, one end of the washer 300, which faces away from the nut 200, is provided with a radially outward-expanding portion 340, the friction convex teeth 330 are arranged on an end surface of the outward-expanding portion 340, and the outward-expanding portion 340 increases the contact area between the washer 300 and a clamped carrier, improves a pre-tightening contact surface, and improves a locking effect.

Referring to fig. 3, in a possible embodiment, the end surface of the second end of the nut 200 is provided with a pressure point groove 230, which can destroy the original tooth shape, so that the nut thread is slightly deformed, and can well play a role in locking, and the combination of the pressure point and the wedge-shaped structure can apply both locking and anti-loosening, so that the structural reliability is stronger.

Referring to fig. 5 and 6, in a possible embodiment, the nut assembly further includes a compression nut 400, the compression nut 400 is in threaded connection with the screw 100, the compression nut 400 has a compression surface 410 abutting against an end surface of the second end of the nut 200, and the nut 200 is compressed by the compression nut 400, so that the compression nut 400 and the nut 200 are pre-tightened, and pre-tightening and anti-loosening in a double-nut structure are realized.

In a possible embodiment, the periphery of the compression nut 400 is provided with an extension cylinder 420 extending towards the washer 300, the extension cylinder 420 abuts against the washer 300, the washer 300 and the nut 200 are compressed by the compression nut 400, multiple pre-tightening of the whole structure is achieved, and the anti-loosening effect is improved.

In one possible embodiment, the internal bore of the extension sleeve 420 is spaced from the peripheral wall of the nut 200 to reduce contact and interference with the peripheral wall of the nut 200 during rotation of the compression nut 400, facilitating installation of the compression nut 400.

In one possible embodiment, the peripheral wall of the extension cylinder 420 is provided with a plurality of circumferentially distributed screwing flats 430 to facilitate screwing operations with a socket or wrench.

The above embodiments are only used for illustrating the technical solutions of the present application and not for limiting the same, and any modification or equivalent replacement without departing from the spirit and scope of the embodiments of the present application should be covered within the technical solutions of the present application.

Claims

1. A wedge structure locknut assembly comprising:

the outer peripheral wall of the screw rod (100) is provided with an external thread;

the nut (200) is provided with an internal thread matched with the screw (100), is in threaded connection with the screw (100), and is provided with a first end and a second end which are oppositely arranged; the end face of the first end is provided with helical teeth (210), and the helical teeth (210) are provided with first inclined planes (211);

the washer (300) is provided with a tooth groove (310) matched with the helical teeth (210) towards one end of the nut (200), and the tooth groove (310) is provided with a second inclined surface (311) attached to the first inclined surface (211);

the first end of the nut (200) is provided with a riveting part (220) clamped into an inner hole of the gasket (300), and the nut (200) and the gasket (300) can rotate relatively.

2. A wedge-structured anti-loose lock nut assembly according to claim 1, wherein: the included angle between the first inclined surface (211) and the cross section of the nut (200) and the included angle between the second inclined surface (311) and the cross section of the nut are larger than the helix angle of the external thread of the screw (100).

3. A wedge-structured anti-loose lock nut assembly according to claim 1, wherein: riveting portion (220) are the form of expanding outward, packing ring (300) are equipped with screens hole (320) with riveting portion (220) adaptation, screens hole (320) are the form of narrowing towards nut (200), just riveting portion (220) expand the end size outward and are greater than the end of narrowing in screens hole (320).

4. A wedge structured locknut assembly in accordance with claim 1, wherein: one end of the washer (300) back to the nut (200) is provided with a friction convex tooth (330).

5. A wedge lock-nut assembly according to claim 4, wherein: one end of the washer (300), which is back to the nut (200), is provided with a radially outward-expanding part (340), and the friction convex teeth (330) are arranged on the end surface of the outward-expanding part (340).

6. A wedge structured locknut assembly in accordance with claim 2, wherein: and a pressure point groove (230) is formed in the end surface of the second end of the nut (200).

7. A wedge structured locknut assembly in accordance with claim 1, wherein: the nut pressing device is characterized by further comprising a pressing threaded sleeve (400), the pressing threaded sleeve (400) is in threaded connection with the screw (100), and the pressing threaded sleeve (400) is provided with a pressing surface (410) which is abutted to the end surface of the second end of the nut (200).

8. The wedge structured locknut assembly of claim 7 wherein: the periphery of the compression screw sleeve (400) is provided with an extension cylinder (420) extending towards the gasket (300), and the extension cylinder (420) is abutted to the gasket (300).

9. A wedge structured locknut assembly in accordance with claim 8, wherein: the inner hole of the extension cylinder (420) has a clearance with the circumferential wall of the nut (200).

10. A wedge structured locknut assembly in accordance with claim 8, wherein: the peripheral wall of the extension cylinder (420) is provided with a plurality of screwing planes (430) distributed along the circumferential direction.