Lock nut with inner clamping ring

Abstract

The utility model relates to the technical field of nuts, in particular to a locknut with an inner clamping ring, which comprises a nut, an inner thread groove is arranged on the inner wall of the nut, an annular groove is arranged on the middle lower portion of the inner thread groove, a rubber clamping ring is arranged in the annular groove, and two thread through grooves which are arranged in bilateral symmetry are arranged on the middle lower portion of the outer wall of the nut. The two threaded through grooves communicate with the annular groove, and the two threaded through grooves are in threaded connection with anti-loosening pressing screws. According to the locknut with the inner clamping ring, the rubber clamping ring is arranged in the nut, and the extrusion effect of the locknut pressing screw is combined, so that tight contact is formed between the rubber clamping ring and the threads of the bolt, the friction force is remarkably increased, reverse rotation of the nut under vibration or impact can be effectively prevented, and the connection stability is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of nut technology, specifically to an anti-loosening nut with an inner retaining ring. Background Technology

[0002] After the nut is tightened onto the bolt, the connection between the nut and the bolt usually maintains a relatively stable tightness. However, in practical applications, the working environment of many fasteners is affected by factors such as vibration, impact, and temperature changes. Especially under long-term vibration conditions, these external forces can cause a difference in vibration frequency between the connected parts, resulting in a slight relative displacement of the connection structure between the nut and the bolt. This displacement gradually accumulates, eventually leading to a tendency for the nut and bolt to loosen in the opposite direction, reducing the stability of the connection, causing the nut to loosen or even fall off, seriously affecting the safety and stability of the equipment.

[0003] Patent CN222163172U discloses an internal retaining ring type anti-loosening nut, including a nut with an internal threaded groove on its inner wall. The nut contains two sets of anti-loosening retaining components, each comprising an arc-shaped mounting groove, a compression spring, an annular limiting block, an arc-shaped limiting groove, a screw, a semi-circular head, a threaded hole, an internal hexagonal limiting groove, and a beveled groove. The threaded hole is located on the left and right sides of the upper outer surface of the nut. This internal retaining ring type anti-loosening nut, through the annular limiting block and compression spring, allows one end of the annular limiting block to engage with the groove on the outer wall of the screw after installation, preventing the nut from loosening and falling off, thus improving stability. Rotating the screw allows one end of the annular limiting block to separate from the groove on the outer wall of the screw, facilitating nut disassembly.

[0004] The existing technology described above achieves the anti-loosening function of the nut by using a ring-shaped limiting block and a compression spring in conjunction with the external screw when connecting the nut to the screw. However, due to the limitations of its structural design, it still has some shortcomings. Specifically, during installation, the ring-shaped limiting block moves under pressure through the arc-shaped mounting groove, compressing the compression spring. After the nut is installed, the return action of the compression spring inserts one end of the ring-shaped limiting block into the groove edge of the screw's outer wall, thus providing a limiting function. However, due to the elastic characteristics of the compression spring, it cannot achieve absolutely stable rigid positioning. Under vibration or impact, the ring-shaped limiting block is prone to displacement due to external forces, weakening or even failing the anti-loosening function of the nut. In addition, the contact between the ring-shaped limiting block and the screw groove edge mainly relies on the spring force, which cannot generate a sufficiently large frictional force, resulting in insufficient anti-loosening performance of the nut in complex vibration environments. In view of the above problems, we propose an anti-loosening nut with an inner retaining ring to further improve the connection stability between the nut and the screw and enhance its anti-loosening performance under vibration and impact environments. Utility Model Content

[0005] The purpose of this invention is to provide an anti-loosening nut with an inner retaining ring to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A locking nut with an inner retaining ring includes a nut with an internal threaded groove on its inner wall for connection with a bolt. An annular groove is formed in the lower middle part of the internal threaded groove, and a rubber retaining ring is placed within the annular groove. Two threaded through grooves are symmetrically arranged on the lower middle part of the outer wall of the nut, both of which communicate with the annular groove. Both threaded through grooves are threadedly connected to a locking clamping screw. Under the compression action of the locking clamping screw, the rubber retaining ring compresses the bolt, causing the inner wall of the rubber retaining ring to tightly fit against the bolt threads, greatly increasing friction and effectively preventing the nut from rotating in the opposite direction.

[0008] Preferably, the inner diameter of the rubber retainer is larger than the outer diameter of the internal thread groove to prevent the rubber retainer from affecting the threaded connection between the internal thread groove and the bolt thread, so that the nut can be smoothly connected to the bolt thread.

[0009] Preferably, the anti-loosening tightening screw has a conical abutment at one end facing the rubber retainer. When the anti-loosening tightening screw is tightened, the conical abutment abuts against the outer wall of the rubber retainer, and the inner wall of the rubber retainer abuts against the outer wall of the bolt connected to the nut, providing an effective compression point and increasing the local friction of the rubber retainer.

[0010] Preferably, the end of the anti-loosening tightening screw away from the rubber retaining ring is provided with a cross-shaped groove knob to facilitate the operator to rotate the anti-loosening tightening screw.

[0011] Preferably, a receiving groove is provided on the outer wall of the nut at the outer edge of the threaded groove. When the anti-loosening tightening screw is tightened, the cross-shaped countersunk knob is located in the receiving groove to accommodate the cross-shaped countersunk knob and prevent the cross-shaped countersunk knob from protruding from the outer wall of the nut and causing wear.

[0012] Preferably, the outer wall of the nut is fitted with a positioning sleeve. When the anti-loosening tightening screw is tightened, the positioning sleeve closes the receiving groove and blocks the outward movement of the cross-shaped countersunk knob, thus preventing the anti-loosening tightening screw from moving outward when the nut is in use.

[0013] Preferably, the top of the outer wall of the nut is provided with an upper limiting block and the bottom of the outer wall of the nut is provided with a lower limiting block to prevent the positioning sleeve from slipping off the nut. When the top of the positioning sleeve moves up to fit with the bottom of the upper limiting block, the receiving groove is fully exposed, ensuring that the operator can smoothly remove the anti-loosening clamping screw before removing the nut.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This anti-loosening nut with an inner retaining ring has a rubber retaining ring inside the nut. Combined with the squeezing action of the anti-loosening clamping screw, the rubber retaining ring and the bolt thread form a tight contact, which significantly increases the friction and can effectively prevent the nut from rotating in the opposite direction under vibration or impact, thus enhancing the stability of the connection.

[0016] 2. This anti-loosening nut with an inner retaining ring has a cross-shaped countersunk knob at one end of the anti-loosening clamping screw, which is convenient for operators to operate and rotate. At the same time, the design of the receiving groove ensures that the knob is inside the outer wall of the nut, which is not easy to wear, further improving the convenience of use.

[0017] 3. The anti-loosening nut with inner retaining ring has a positioning sleeve that can close the receiving groove when the anti-loosening clamping screw is tightened, preventing the anti-loosening clamping screw from moving outward during use, thereby ensuring the overall stability of the nut and the connecting parts and preventing loosening of the connection due to component displacement.

[0018] 4. The anti-loosening nut with an inner retaining ring, along with the upper and lower limiting blocks, effectively prevents the positioning sleeve from slipping off the nut, ensuring that the stability of the nut is not affected before the anti-loosening clamping screw is removed, thus enhancing the overall connection safety. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall first-view structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the overall second-view structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the overall exploded structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the assembly structure of the nut and rubber retainer ring in this utility model;

[0023] Figure 5 This is a schematic diagram of the assembly structure of the nut and the anti-loosening clamping screw in this utility model;

[0024] In the diagram: 1. Nut; 10. Internal thread groove; 11. Annular groove; 12. Threaded through groove; 13. Receiving groove; 2. Rubber retaining ring; 3. Anti-loosening clamping screw; 30. Conical stop block; 31. Cross-shaped countersunk knob; 4. Upper limit block; 5. Lower limit block; 6. Positioning sleeve block. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] Please see Figures 1-5 This utility model provides a technical solution:

[0028] A locking nut with an inner retaining ring includes a nut 1. The inner wall of the nut 1 has an internal threaded groove 10 for connecting with a bolt. The lower middle part of the internal threaded groove 10 has an annular groove 11, and a rubber retaining ring 2 is placed in the annular groove 11. The lower middle part of the outer wall of the nut 1 has two threaded through grooves 12 arranged symmetrically from left to right. Both threaded through grooves 12 are connected to the annular groove 11. Both threaded through grooves 12 are threadedly connected to a locking clamping screw 3. Under the squeezing action of the locking clamping screw 3, the rubber retaining ring 2 squeezes the bolt, thereby making the inner wall of the rubber retaining ring 2 tightly fit with the threads of the bolt, greatly increasing the friction and effectively preventing the nut 1 from rotating in the opposite direction.

[0029] In this embodiment, the inner diameter of the rubber retainer 2 is larger than the outer diameter of the internal thread groove 10, so as to avoid the rubber retainer 2 affecting the thread of the internal thread groove 10 and the bolt thread connection, so that the nut 1 can be smoothly connected to the bolt thread.

[0030] Specifically, a conical abutment 30 is provided at one end of the anti-loosening tightening screw 3 facing the rubber retainer 2. When the anti-loosening tightening screw 3 is tightened, the conical abutment 30 abuts against the outer wall of the rubber retainer 2, and the inner wall of the rubber retainer 2 abuts against the outer wall of the bolt connected to the nut 1, providing an effective compression point and increasing the local friction of the rubber retainer 2.

[0031] Furthermore, the end of the anti-loosening tightening screw 3 away from the rubber retainer 2 is provided with a cross-shaped countersunk knob 31, so that the operator can rotate the anti-loosening tightening screw 3.

[0032] Furthermore, a receiving groove 13 is provided on the outer wall of the nut 1 at the outer edge of the threaded through groove 12. When the anti-loosening clamping screw 3 is tightened, the cross countersunk knob 31 is located in the receiving groove 13 to accommodate the cross countersunk knob 31 and prevent the cross countersunk knob 31 from protruding from the outer wall of the nut 1 and causing wear.

[0033] Furthermore, a positioning sleeve 6 is fitted on the outer wall of the nut 1. When the anti-loosening clamping screw 3 is tightened, the positioning sleeve 6 closes the receiving groove 13, which blocks the outward movement of the cross countersunk knob 31 and prevents the anti-loosening clamping screw 3 from moving outward when the nut 1 is in use.

[0034] Furthermore, an upper limiting block 4 is provided at the top of the outer wall of nut 1, and a lower limiting block 5 is provided at the bottom of the outer wall of nut 1 to prevent the positioning sleeve block 6 from slipping off nut 1. When the top of the positioning sleeve block 6 moves up to fit with the bottom of the upper limiting block 4, the receiving groove 13 is fully exposed, ensuring that the operator can smoothly remove the anti-loosening clamping screw 3 before removing nut 1.

[0035] In this embodiment, when using the anti-loosening nut with an inner retaining ring, first connect the nut 1 to the bolt thread through its internal thread groove 10 and tighten it. Then, move the positioning sleeve 6 along the outer wall of the nut 1 to the position of the upper limit block 4, so that the receiving groove 13 is fully exposed. At this time, use a tool to rotate the cross countersunk knob 31 of the anti-loosening clamping screw 3 to screw the anti-loosening clamping screw 3 into the nut 1 along the threaded through groove 12. The conical abutment 30 at its end will then press the rubber retaining ring 2 in the annular groove 11, forcing the rubber retaining ring to... The ring 2 deforms inward and fits tightly against the bolt threads, thereby increasing friction to prevent the nut 1 from loosening. After tightening, the cross countersunk knob 31 is fully embedded in the receiving groove 13. At this time, the positioning sleeve 6 is moved down to close the receiving groove 13 to restrict the outward movement of the anti-loosening clamping screw 3. When disassembly is required, the positioning sleeve 6 is first moved up to expose the receiving groove 13, and the cross countersunk knob 31 is rotated in the opposite direction to loosen the anti-loosening clamping screw 3, releasing the clamping effect of the rubber retainer ring 2 on the bolt, and the nut 1 can be unscrewed smoothly.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A locking nut with an inner retaining ring, comprising a nut (1), wherein the inner wall of the nut (1) is provided with an internal thread groove (10), characterized in that: The lower middle part of the internal thread groove (10) is provided with an annular groove (11), and a rubber retainer (2) is provided in the annular groove (11). The lower middle part of the outer wall of the nut (1) is provided with two threaded through grooves (12) arranged symmetrically from left to right. Both threaded through grooves (12) are connected to the annular groove (11), and both threaded through grooves (12) are threadedly connected with anti-loosening clamping screws (3).

2. The anti-loosening nut with an inner retaining ring according to claim 1, characterized in that: The inner diameter of the rubber retainer (2) is larger than the outer diameter of the internal thread groove (10).

3. The anti-loosening nut with an inner retaining ring according to claim 1, characterized in that: The anti-loosening tightening screw (3) has a conical abutment (30) at one end facing the rubber retainer (2). When the anti-loosening tightening screw (3) is tightened, the conical abutment (30) abuts against the outer wall of the rubber retainer (2), and the inner wall of the rubber retainer (2) abuts against the outer wall of the bolt connected to the nut (1).

4. The anti-loosening nut with an inner retaining ring according to claim 1, characterized in that: The anti-loosening tightening screw (3) has a cross-shaped countersunk knob (31) at the end away from the rubber retainer (2).

5. The anti-loosening nut with an inner retaining ring according to claim 4, characterized in that: The nut (1) has a receiving groove (13) on its outer wall at the outer edge of the threaded groove (12). When the anti-loosening tightening screw (3) is tightened, the cross-shaped countersunk knob (31) is located in the receiving groove (13).

6. The anti-loosening nut with an inner retaining ring according to claim 5, characterized in that: The outer wall of the nut (1) is fitted with a positioning sleeve (6). When the anti-loosening tightening screw (3) is tightened, the positioning sleeve (6) closes the receiving groove (13).

7. The anti-loosening nut with an inner retaining ring according to claim 6, characterized in that: The top of the outer wall of the nut (1) is provided with an upper limiting block (4), and the bottom of the outer wall of the nut (1) is provided with a lower limiting block (5). When the top of the positioning sleeve (6) moves up to fit against the bottom of the upper limiting block (4), the receiving groove (13) is fully exposed.

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