Lock nut mechanism

Abstract

The utility model provides a locknut mechanism which comprises a first nut, a second nut, a third nut and a fourth nut, the first nut is provided with a first conical portion, the outer diameter of the first conical portion gradually shrinks towards the end face, and a first open groove penetrating through the side wall of the first nut is formed in the circumferential direction of the first nut; the inner diameter position of the second nut is provided with a second conical part with the same taper as the first conical part; wherein the first nut and the second nut can be in threaded connection to a screw rod at the same time, and the first nut and the second nut move oppositely in the axis direction; the deformation capacity of the two nuts in the using process is improved in the mode that the grooves are formed in the first nut and the second nut, when the second nut gets close to the first nut, the first nut can be locked on the threaded rod, the middle sleeve is in close contact with the second nut, and the first nut and the second nut can be tightly locked. Therefore, the friction force between the second nut and the middle sleeve is improved, the excellent anti-loosening performance is achieved, the locking force is evenly distributed, installation is convenient, and the overall reliability and durability of the nut are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to mechanical locking mechanism technical field relates to a lock nut mechanism. BACKGROUND

[0002] In the field of mechanical connection, nuts as important fasteners are widely used in various equipment and structures. However, the traditional nut is prone to loosening under vibration, impact or dynamic load environment, leading to connection failure, and even causing safety accidents.

[0003] To prevent the nut from loosening, the prior art usually adopts a double-nut structure, installs an elastic washer between the nut and the connecting piece, or sets a deformation component inside the nut to increase the friction force. However, the above anti-loosening structure still has the defects of poor anti-loosening effect, inconvenient installation, and limitations during use. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a lock nut mechanism to solve the problems of poor anti-loosening effect, inconvenient installation, and high limitations of the existing lock nut in the background technology.

[0005] The technical scheme of the utility model is implemented as follows:

[0006] A lock nut mechanism comprises:

[0007] A first nut has a first tapered portion with a gradually reduced outer diameter dimension towards an end face, and a first slot is formed in the circumferential direction of the first nut and penetrates the side wall of the first nut;

[0008] A second nut has a second tapered portion with the same taper as the first tapered portion at the inner diameter position;

[0009] The first nut and the second nut can be threadedly connected to a screw at the same time, and when the first nut and the second nut move towards each other along the axial direction, the second tapered portion can tightly abut against the first tapered portion, so that the first nut is locked on the screw.

[0010] Preferably, an intermediate sleeve is synchronously rotationally connected to the first nut, the second nut can be sleeved in the inner hole of the intermediate sleeve, and the outer diameter dimension of the second nut extending to the inner hole of the intermediate sleeve is gap-fitted with the inner diameter dimension of the intermediate sleeve.

[0011] Preferably, the second nut has a second slot formed in the circumferential direction and penetrating the side wall of the second nut, and the outer wall of the second nut can tightly abut against the inner wall of the intermediate sleeve during the process of the second nut moving towards the first nut along the axial direction.

[0012] Preferably, the first nut is connected with a first clamping part near one end of the first taper part, the first clamping part is in a regular polygonal structure in cross section, and the inner hole of the intermediate sleeve has a second clamping part near one end, which is matched with the first clamping part and can be sleeved on the first clamping part.

[0013] Preferably, the outer wall of the intermediate sleeve has a third clamping part in a regular polygonal structure in cross section.

[0014] Preferably, the second nut is provided with a fourth clamping part near one end of the second taper part, and the fourth clamping part is in a regular polygonal structure in cross section.

[0015] Preferably, the first nut is provided with a pad near one end of the first clamping part, and the outer edge of the pad extends to the outside of the first clamping part.

[0016] Preferably, the first nut is further provided with a third slot, which is arranged on the other side of the first taper part opposite to the first slot and penetrates the first taper part in the radial direction.

[0017] With the above technical scheme, the utility model has the advantages of:

[0018] The utility model discloses a first nut and a second nut are provided with slots, which improves the deformation ability of the two nuts during use, and when the second nut approaches the first nut, the first nut can be locked on the screw rod, the intermediate sleeve is in close contact with the second nut, the friction between the second nut and the intermediate sleeve is improved, the anti-loosening performance is excellent, the locking force is uniformly distributed, the installation is convenient, and the reliability and durability of the nut are improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to the drawings without creative labor.

[0020] Figure 1 It is a perspective view of the utility model;

[0021] Figure 2 It is an exploded view of the utility model;

[0022] Figure 3 It is a sectional view of the utility model;

[0023] Figure 4 It is a perspective view of the first nut of the utility model;

[0024] Figure 5 It is a perspective view of the intermediate sleeve of the utility model;

[0025] Figure 6 It is a perspective view of the second nut of the utility model.

[0026] Among them:

[0027] 1, the first nut; 101, the first tapered portion; 102, the first clamping portion; 103, the backing plate; 104, the first slot; 105, the third slot;

[0028] 2, the second nut; 201, the second slot; 202, the fourth clamping portion;

[0029] 3, the intermediate sleeve; 301, the second clamping portion; 302, the third clamping portion;

[0030] 4, the screw rod. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0032] As shown in the figure, a kind of locknut mechanism, including first nut 1, second nut 2 and intermediate sleeve 3, wherein:

[0033] First nut 1, which has first tapered portion 101 with the diameter dimension gradually shrinking to the end face direction, and first slot 104 is opened in the circumferential direction of first nut 1 through its side wall;

[0034] Second nut 2, which has second tapered portion with the same taper as first tapered portion 101 at inner diameter position;

[0035] Wherein, first nut 1 and second nut 2 can be threadedly connected on a screw rod 4 at the same time, and when first nut 1 and second nut 2 move towards along axial direction, second tapered portion can tightly adhere to first tapered portion 101, so that first nut 1 is locked on screw rod 4. Specifically, the inner hole of first nut 1 and second nut 2 is provided with internal thread, which can be connected on screw rod 4 by threaded connection. Since first slot 104 is provided on first nut 1, first nut 1 has certain deformation ability under radial external force, and when first nut 1 is tightened and axially moves to second nut 2, first nut 1 is tightened by the contact between first tapered portion 101 and second tapered portion, so that first nut 1 is locked on screw rod 4.

[0036] Specifically, the intermediate sleeve 3 is synchronously connected to the first nut 1, and more specifically, the first nut 1 is connected with the first clamping portion 102 at the end close to the large end of the first tapered portion 101, the first clamping portion 102 has a cross-section in the shape of a regular polygon, the inner hole of the intermediate sleeve 3 has a second clamping portion 301 at the position close to the end, the second clamping portion 301 can be sleeved on the first clamping portion 102, and the outer wall of the intermediate sleeve 3 has a third clamping portion 302 in the shape of a regular polygon, in this case, the cross-section shapes of the first clamping portion 102, the second clamping portion 301 and the third clamping portion 302 are all regular hexagons, the third clamping portion 302 of the intermediate sleeve 3 can be acted on by a wrench, the intermediate sleeve 3 can be rotated, and the first nut 1 can also be rotated at the same time, so as to lock the target part.

[0037] The second nut 2 can be sleeved in the inner hole of the intermediate sleeve 3, the outer diameter size of the second nut 2 extending to the inner hole of the intermediate sleeve 3 is in clearance fit with the inner diameter size of the intermediate sleeve 3, specifically, the second nut 2 is provided with a second slot 201 penetrating through the side wall in the circumferential direction, the outer wall of the second nut 2 can be tightly attached to the inner wall of the intermediate sleeve 3 in the process of moving along the axis direction and approaching the first nut 1, so that the second nut 2 can press the first nut 1 to make the first nut 1 tighten on the screw rod 4 when the second nut 2 works, and the first nut 1 also acts on the second nut 2, so that the second nut 2 is deformed and the outer diameter is enlarged in the radial direction, and in order to avoid excessive expansion of the second nut 2, the intermediate sleeve 3 is used to make the outer wall of the second nut 2 tightly attached to the inner wall of the intermediate sleeve 3, so that the second nut 2 is tightly fixed on the intermediate sleeve 3 through the friction therebetween, and since the second nut 2 is threadedly connected with the screw rod 4 and the first nut 1 is threadedly connected with the screw rod 4, the entire nut mechanism can have the anti-loose effect.

[0038] Specifically, the second nut 2 is provided with a fourth clamping portion 202 at the end close to the small end of the second tapered portion, the cross-section shape of the fourth clamping portion 202 is a regular polygonal structure, and in this case, the regular polygonal structure is a regular hexagon, and the purpose of the fourth clamping portion 202 is to facilitate the rotation of the second nut 2 by a wrench.

[0039] Specifically, the first nut 1 is provided with a pad 103 at the end close to the first clamping portion 102, the outer edge of the pad 103 extends to the outside of the first clamping portion 102, and the pad 103 is designed to contact the target part and increase the contact area with the target part.

[0040] Specifically, the first nut 1 is further provided with a third slot 105, which is arranged on the other side of the first tapering portion 101 opposite to the first slot 104 and penetrates the first tapering portion 101 along the radial direction, and in this embodiment, the number of the third slot 105 is one, and in addition, the number of the third slot 105 can be designed according to the size of the first nut 1; the third slot 105 is mainly arranged to improve the deformation capacity of the first tapering portion 101 and to make the stress of each part of the first tapering portion 101 uniform.

[0041] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A lock nut mechanism, characterized by, The utility model relates to a nut locking device, including: The first nut (1) has the first taper portion (101) with the end face direction tapering of the outer diameter size on it, and the first slot (104) that passes through its lateral wall is opened in the circumferential direction of the first nut (1); The second nut (2) has the second taper portion with the same taper as the first taper portion (101) in the inner diameter position; Wherein, the first nut (1) and the second nut (2) can be connected on a screw (4) simultaneously, and when the first nut (1) and the second nut (2) move towards along the axial direction, the second taper portion can tightly adhere to the first taper portion (101), so that the first nut (1) is locked on the screw (4).

2. A chequer nut mechanism according to claim 1, wherein: It further includes the intermediate sleeve (3) that synchronous rotation is connected on the first nut (1), the second nut (2) can be set in the inner hole of the intermediate sleeve (3), and the outer diameter size of the second nut (2) extending to the inner hole of the intermediate sleeve (3) is gap fit with the inner diameter size of the intermediate sleeve (3).

3. A chequer nut mechanism according to claim 2, wherein: The circumferential direction of the second nut (2) is provided with the second slot (201) that passes through its lateral wall, and the outer wall of the second nut (2) can tightly adhere to the inner wall of the intermediate sleeve (3) in the process of the second nut (2) approaching the first nut (1) along the axial direction.

4. A lock nut mechanism according to claim 2, wherein: The first nut (1) is connected with the first clamping portion (102) at the end of the large head near the first taper portion (101), the cross section of the first clamping portion (102) is a regular polygon structure, the inner hole of the intermediate sleeve (3) has the second clamping portion (301) matched with the first clamping portion (102) at the position near the end, and the second clamping portion (301) can be set on the first clamping portion (102).

5. A lock nut mechanism according to claim 2, wherein: The outer wall of the intermediate sleeve (3) has the third clamping portion (302) with the cross section of regular polygon.

6. A lock nut mechanism according to claim 1 wherein: The end of the second nut (2) near the small end of the second taper portion is provided with the fourth clamping portion (202), and the cross section shape of the fourth clamping portion (202) is a regular polygon structure.

7. A lock nut mechanism according to claim 4, wherein: The end of the first nut (1) near the first clamping portion (102) is provided with the backing plate (103), and the outer edge of the backing plate (103) extends to the outside of the first clamping portion (102).

8. A lock nut mechanism according to claim 1 wherein: The first nut (1) is further provided with the third slot (105), and the third slot (105) is arranged on the other side of the first taper portion (101) opposite to the first slot (104), and the third slot (105) penetrates the first taper portion (101) along the radial direction.

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