Self-locking type locknut combination

Abstract

The utility model relates to the technical field of locknuts, and provides a self-locking type locknut combination which is rotatably arranged on a bolt and comprises a nut body, a locking part and a locking part, the nut body is provided with an internal thread part; and the clamping ring plate is arranged on the nut body, the clamping ring plate is provided with a necking end, and the necking end is clamped on the outer wall of the bolt. By means of the technical scheme, the problem that an existing locknut in the related technology is poor in locking effect is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of anti-loosening nuts, and specifically to a self-locking anti-loosening nut combination. Background Art

[0002] The existing common nuts are widely used for fastening general static fixtures and are very convenient to use. However, they have the disadvantage of poor stability, and the nuts tend to loosen, which brings great insecurity to the operation or machine. Especially on large-scale operating machinery or machines, due to the high-speed rotation of the roller shaft in the machine and the internal and external vibrations, the nuts fixed on the bolts tend to loosen, making the machine unable to operate and work normally, and the existing nuts have poor anti-loosening effect. Utility Model Content

[0003] The utility model provides a self-locking anti-loosening nut combination, which solves the problem that the existing anti-loosening nut in the related technology has a poor anti-loosening effect.

[0004] The technical solution of the utility model is as follows:

[0005] A self-locking anti-loosening nut assembly is rotatably arranged on a bolt, comprising:

[0006] A nut body having an internal thread portion;

[0007] A clamping ring plate is arranged on the nut body, and the clamping ring plate has a necked end, and the necked end is clamped on the outer wall of the bolt.

[0008] Preferably, the bolt has an external threaded portion, the internal threaded portion and the external threaded portion are threadedly connected, and the necked end is clamped and connected to the external threaded portion.

[0009] Preferably, the snap ring plate comprises:

[0010] An annular plate body, the annular plate body is in a truncated cone shape, and the annular plate body is a thin plate with uniform wall thickness;

[0011] There are a plurality of limiting protrusions, which are arranged at intervals on the necked end, and the limiting protrusions are clamped on the external threaded portion.

[0012] Preferably, the nut body has an inner cavity, and the internal threaded portion is arranged on the inner wall of the inner cavity;

[0013] The position of the annular plate body close to the necked end is a first opening, and the diameter of the first opening is smaller than the diameter of the bolt.

[0014] Preferably, the annular plate body has a through groove, and there are a plurality of the through grooves, which are spaced apart in the circumferential direction of the annular plate body. After the bolt passes through the first opening, the through groove provides deformation space for the annular plate body.

[0015] Preferably, it also includes:

[0016] An anti-loosening washer is provided with a plurality of tooth grooves at intervals along the anti-loosening washer. The anti-loosening washer is provided on a side of the nut body away from the annular plate body, and the tooth grooves are located on a side away from the nut body.

[0017] Preferably, two nut bodies are provided on the same bolt, the two nut bodies are threadedly connected to the bolt in opposite directions, and the anti-loosening washers on the two nut bodies are engaged with each other.

[0018] Preferably, the nut body has a slot, at least two of which are arranged symmetrically about the center of the nut body, and the slot is connected to the inner cavity; further comprising:

[0019] The ball bearings are slidably disposed in the slots, and each slot is provided with a ball bearing.

[0020] Preferably, the groove body of the slot gradually increases along the rotation direction of the internal thread portion.

[0021] Preferably, the limiting protrusion and the annular plate body are an integrated structure.

[0022] The working principle and beneficial effects of the utility model are:

[0023] In the utility model, the nut body is screwed onto the preset bolt until it is tightened to the required torque. The necked end of the clamping ring plate is elastically deformed due to the resistance of the outer wall of the bolt, and fits tightly against the outer wall of the bolt, forming an additional reverse force to prevent the nut from rotating counterclockwise when subjected to vibration or external force, thereby achieving self-locking and anti-loosening. Even in an environment of high-speed rotation or strong vibration, this structure can effectively prevent the nut from accidentally loosening, ensuring the stable operation and safe operation of the machine. The necked end design of the clamping ring plate significantly enhances the fastening stability of the nut under dynamic load conditions, effectively preventing the nut from loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present utility model.

[0025] Figure 1 This is a schematic diagram of the connection structure between the nut body and the bolt of the utility model;

[0026] Figure 2 This is a schematic diagram of the nut body structure of the utility model;

[0027] Figure 3 for Figure 2 A partial enlarged view of the middle part;

[0028] Figure 4 This is a schematic diagram of the internal structure of the nut body of the utility model;

[0029] Figure 5 This is a schematic diagram of the bolt structure of the utility model.

[0030] In the figure: 1, bolt; 101, external threaded portion; 2, nut body; 201, inner cavity; 202, internal threaded portion; 203, slot; 204, ball; 3, snap ring plate; 31, annular plate body; 301, necked end; 302, through groove; 303, limiting protrusion; 4, anti-loosening washer; 401, tooth groove. DETAILED DESCRIPTION

[0031] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0032] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0033] In this article, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0034] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0035] Reference Figure 1~Figure 5 , which is an embodiment of the utility model, proposes a self-locking anti-loosening nut combination, which is rotatably set on the bolt 1, including: a nut body 2, having an internal threaded portion 202; a clamping ring plate 3, which is set on the nut body 2, and the clamping ring plate 3 has a necked end 301, and the necked end 301 is clamped on the outer wall of the bolt 1.

[0036] In the above scheme, the problem that the existing common anti-loosening nut is easy to loosen under dynamic load and vibration environment is particularly suitable for fastening applications in large mechanical equipment. It is made of high-strength alloy steel, has a standard internal thread part 202, and is designed to fit tightly with the bolt 1 of the corresponding specification. The outer dimensions of the nut body 2 are similar to those of the traditional nut, but a clamping ring plate 3 is designed on its top. The clamping ring plate 3 is made of spring steel material with good elasticity and is designed as a ring structure. One side has a necked end 301 that matches the outer wall of the bolt 1. The other side of the clamping ring plate 3 is connected to the top interface of the nut body 2 by mechanical fixing or welding. The diameter of the necked end 301 is slightly smaller than the outer diameter of the bolt 1, but when the nut body 2 is tightened onto the bolt 1, the necked end 301 can expand by its own elasticity and firmly clamp onto the outer wall of the bolt 1 to form a reliable anti-loosening mechanism. During the installation process, the nut body 2 of the self-locking anti-loosening nut is first screwed into the preset bolt 1 until it is tightened to the required torque. At this time, the necked end 301 of the clamping ring plate 3 is elastically deformed due to the resistance of the outer wall of the bolt 1, and fits tightly against the outer wall of the bolt 1, forming an additional reverse force to prevent the nut from rotating counterclockwise when subjected to vibration or external force, thereby achieving self-locking and anti-loosening. Even in an environment of high-speed rotation or strong vibration, this structure can effectively prevent the nut from accidentally loosening, ensuring the stable operation and safe operation of the machine. Enhanced anti-loosening performance: The design of the necked end 301 of the clamping ring plate 3 significantly enhances the fastening stability of the nut under dynamic load conditions, effectively preventing the nut from loosening.

[0037] Furthermore, the bolt 1 has an external threaded portion 101 , the internal threaded portion 202 is threadedly connected to the external threaded portion 101 , and the necked end 301 is pressed and clamped on the external threaded portion 101 .

[0038] In the above scheme, the bolt 1 is made of high-strength steel. In addition to the basic load-bearing part, its external thread part 101 is precisely processed to ensure a tight fit with the internal thread part 202. The necked end 301 of the clamping ring plate 3 is specially treated, and its inner surface is designed with a slight bulge or texture, which not only enhances the friction between the external thread part 101 of the bolt 1, but also enables the necked end 301 to "bite" more tightly into the external thread of the bolt 1 during the tightening process of the nut, achieving a more stable compression clamping. This design effectively utilizes the external thread structure of the bolt 1 itself, and further improves the anti-loosening effect. When the nut body 2 and the bolt 1 are threadedly connected through the internal thread part 202 and the external thread part 101, the necked end 301 of the clamping ring plate 3 is compressed during the tightening process, and its bulge or texture design is tightly combined with the external thread of the bolt 1 to form a solid mechanical interlocking structure. This design not only utilizes the tightening force of the thread itself, but also greatly enhances the anti-loosening performance through the additional pressure of the clamping ring plate 3. Under dynamic load or mechanical vibration conditions, the tight clamping connection between the necked end 301 and the external thread of the bolt 1 can effectively absorb and disperse the lateral force acting on the bolt 1, reduce the possibility of the nut loosening due to vibration, and ensure the long-term stability of the connection. This embodiment achieves a more stable and reliable anti-loosening connection between the nut and the bolt 1 through the optimized design of the external threaded portion 101 of the bolt 1 and the necked end 301 of the clamping ring plate 3, which is particularly suitable for those application scenarios that have strict requirements on the anti-loosening performance of fasteners, such as heavy machinery, railway vehicles, wind power generation equipment, etc., and effectively improves the safety and reliability of the equipment.

[0039] Furthermore, the clamping ring plate 3 includes: an annular plate body 31, which is in a truncated cone shape and is a thin plate with uniform wall thickness; a plurality of limiting protrusions 303, which are spaced apart at the necking end 301, and the limiting protrusions 303 are clamped on the external threaded portion 101.

[0040] In the above scheme, the main part of the clamping ring plate 3 is designed to be truncated cone-shaped, that is, the diameter of the annular plate body 31 gradually decreases from the connecting end of the nut body 2 to the necking end 301. This truncated cone design is not only conducive to the smooth sliding of the clamping ring plate 3 on the bolt 1, but also can distribute the pressure more evenly during tightening, enhance the contact area with the external thread part 101 of the bolt 1, and improve the overall stability. Thin plate structure with uniform wall thickness: The annular plate body 31 adopts a thin plate design with uniform wall thickness, which ensures the elasticity and flexibility of the clamping ring plate 3, so that it can be appropriately deformed during the installation process to adapt to the external thread of the bolt 1, while maintaining sufficient strength to resist vibration and impact during operation or machine operation. At the necking end 301 of the clamping ring plate 3, a number of evenly spaced limiting protrusions 303 are set. These protrusions are arranged in the spiral direction of the external thread of the bolt 1. When the nut is tightened, the limiting protrusion 303 can be accurately inserted into the external thread groove of the bolt 1 to form multiple fixed limiting points, effectively preventing the nut from reversing and moving, and enhancing the anti-loosening performance. The mutual engagement between the limiting protrusion 303 and the external thread of the bolt 1 is equivalent to adding multiple physical stop points on the bolt 1, which can effectively prevent the nut from loosening even under extreme vibration or impact conditions, thereby improving the reliability of the entire fastening system.

[0041] Furthermore, the nut body 2 has an inner cavity 201 , and the internal threaded portion 202 is arranged on the inner wall of the inner cavity 201 ; the position of the annular plate body 31 close to the necked end 301 is a first opening, and the diameter of the first opening is smaller than the diameter of the bolt 1 .

[0042] In the above solution, the nut body 2 is designed with an inner cavity 201, and the inner thread portion 202 is precisely machined on the inner wall of the inner cavity 201. Such a design not only ensures the accuracy of the thread, but also provides sufficient space for the installation of the clamping ring plate 3, which is convenient for assembly and adjustment. The annular plate body 31 is specially provided with a first opening near the necked end 301, and the diameter of this opening is carefully calculated to ensure that it is smaller than the diameter of the bolt 1.

[0043] Furthermore, the annular plate body 31 has a plurality of through grooves 302 , which are spaced apart in the circumferential direction of the annular plate body 31 . After the bolt 1 passes through the first opening, the through grooves 302 provide deformation space for the annular plate body 31 .

[0044] In the above scheme, the through grooves 302 are arranged at intervals: a plurality of through grooves 302 are arranged at intervals in the circumferential direction of the annular plate body 31. These through grooves 302 are evenly distributed along the circumferential direction of the annular plate body 31, providing a specific flexible area for the clamping ring plate 3. Each through groove 302 ensures that the annular plate body 31 is endowed with sufficient deformation capacity without affecting the overall strength. After the bolt 1 passes through the first opening, as the nut is tightened, the necked end 301 of the annular plate body 31 is tightly clamped on the external thread of the bolt 1. At this time, the presence of the through grooves 302 provides the annular plate body 31 with the necessary deformation space, allowing it to bend or expand moderately when subjected to force to adapt to the contour of the bolt 1, thereby forming a tighter and more stable bite.

[0045] Furthermore, it also includes: a locking washer 4, a plurality of tooth grooves 401 are arranged at intervals along the locking washer 4, the locking washer 4 is arranged on the side of the nut body 2 away from the annular plate 31, and the tooth grooves 401 are located on the side away from the nut body 2. Two nut bodies 2 are arranged on the same bolt 1, and the two nut bodies 2 are threadedly connected to the bolt 1 in opposite directions, and the locking washers 4 on the two nut bodies 2 are engaged with each other.

[0046] In the above solution, the anti-loosening washers 4 bite each other to limit the position of the two nut bodies 2 arranged oppositely.

[0047] Furthermore, the nut body 2 has a slot 203, at least two of which are arranged symmetrically with respect to the center of the nut body 2, and the slot 203 is connected to the inner cavity 201; and also includes: a ball 204, which is slidably arranged in the slot 203, and each slot 203 is provided with a ball 204. The slot body of the slot 203 gradually increases along the rotation direction of the internal thread portion 202. Symmetrical arrangement of the slot 203: at least two slots 203 are arranged in the nut body 2, and the two slots 203 are arranged symmetrically in the center of the nut body 2, ensuring the balance and stability of the nut when rotating. Each slot 203 is connected to the inner cavity 201, which facilitates the installation and movement of the ball 204. A ball 204 is embedded in each slot 203, and these balls 204 can slide freely in the slot 203, but will not fall off due to the size of the slot 203. The introduction of the ball 204 increases the flexibility of the contact point between the nut and the bolt 1, reduces friction resistance, and provides additional anti-loosening protection in the tightened state. The groove body of the slot 203 gradually increases along the rotation direction of the internal thread portion 202. This design ensures that during the process of rotating and tightening the nut, the ball 204 can gradually roll forward along the slot 203 until the end of the slot 203. This design not only guides the ball 204 to the correct position, but also uses the rolling friction of the ball 204 to enhance the self-locking effect of the nut.

[0048] Furthermore, the limiting protrusion 303 and the annular plate body 31 are an integrated structure.

[0049] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A self-locking anti-loosening nut assembly, rotatably arranged on a bolt (1), characterized in that: include; The nut body (2) has an internal thread portion (202); A clamping ring plate (3) is arranged on the nut body (2), and the clamping ring plate (3) has a necked end (301), and the necked end (301) is clamped on the outer wall of the bolt (1).

2. The self-locking anti-loosening nut assembly according to claim 1, characterized in that: The bolt (1) has an external threaded portion (101), the internal threaded portion (202) and the external threaded portion (101) are threadedly connected, and the necked end (301) is pressed and clamped on the external threaded portion (101).

3. The self-locking anti-loosening nut assembly according to claim 2, characterized in that: The snap ring plate (3) comprises: An annular plate body (31), the annular plate body (31) is in a truncated cone shape, and the annular plate body (31) is a thin plate with uniform wall thickness; There are a plurality of limiting protrusions (303), and the limiting protrusions (303) are arranged at intervals on the necked end (301), and the limiting protrusions (303) are clamped on the external threaded portion (101).

4. The self-locking anti-loosening nut assembly according to claim 3, characterized in that: The nut body (2) has an inner cavity (201), and the internal thread portion (202) is arranged on the inner wall of the inner cavity (201); The position of the annular plate body (31) close to the necked end (301) is a first opening, and the diameter of the first opening is smaller than the diameter of the bolt (1).

5. The self-locking anti-loosening nut assembly according to claim 4, characterized in that: The annular plate body (31) has a through groove (302), and there are a plurality of the through grooves (302). The plurality of through grooves (302) are arranged at intervals in the circumferential direction of the annular plate body (31). After the bolt (1) passes through the first opening, the through groove (302) provides a deformation space for the annular plate body (31).

6. The self-locking anti-loosening nut assembly according to claim 4, characterized in that: Also includes: An anti-loosening washer (4) is provided with a plurality of tooth grooves (401) at intervals along the anti-loosening washer (4); the anti-loosening washer (4) is provided on a side of the nut body (2) away from the annular plate body (31), and the tooth grooves (401) are located on a side away from the nut body (2).

7. The self-locking anti-loosening nut assembly according to claim 6, characterized in that: Two nut bodies (2) are arranged on the same bolt (1), the two nut bodies (2) are threadedly connected to the bolt (1) in opposite directions, and the anti-loosening washers (4) on the two nut bodies (2) are engaged with each other.

8. The self-locking anti-loosening nut assembly according to claim 4, characterized in that: The nut body (2) has a slot (203) therein, at least two slots (203) are provided, the two slots (203) are centrally symmetrically arranged about the center of the nut body (2), and the slots (203) are in communication with the inner cavity (201); and further comprises: The ball bearings (204) are slidably disposed in the slots (203), and each slot (203) is provided with one ball bearing (204).

9. The self-locking anti-loosening nut assembly according to claim 8, characterized in that: The groove body of the clamping groove (203) gradually increases along the rotation direction of the internal thread portion (202).

10. The self-locking anti-loosening nut assembly according to claim 3, characterized in that: The limiting protrusion (303) and the annular plate body (31) are an integrated structure.

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