A composite rotary thread self-locking structure

Abstract

This utility model discloses a composite rotary thread self-locking structure, including an outer nut, an elastic retaining ring, an elastic body, a locking block, an inner nut, and a connecting member. The outer nut and the inner nut are connected in a mating manner. The elastic retaining ring is disposed inside the outer nut, and the elastic body is located inside the elastic retaining ring. The locking block is disposed on the inner nut and has a starting stop end face and a locking inclined surface. The inner nut has a locking stop end face that mates with the locking block. The connecting member is connected to the inner nut. In practical use, this utility model involves sequentially installing the locking block and the elastic body into the inner nut, then installing the outer nut, inserting the elastic retaining ring, and finally screwing the nut assembly into the connecting member to form a composite rotary thread self-locking structure. This achieves the functions of no additional assembly steps, easy disassembly, high temperature resistance, and reliable thread locking.

Description

Technical Field

[0001] This utility model relates to the field of connection structures commonly used in the machinery industry, specifically a composite rotary thread self-locking structure. Background Technology

[0002] Threaded connections are a common connection structure in the machinery industry. They are characterized by stable connections, simple structure, and easy disassembly, and are widely used in mechanical connection fields. Threaded connections prevent loosening caused by vibration, load changes, etc., which could affect the reliable operation of the machinery.

[0003] Existing solutions employ methods such as set screw fastening, applying fastening adhesive, and nylon self-locking. These solutions each have drawbacks, including increased assembly steps, difficulty in disassembly, and poor high-temperature resistance. To address these technical issues, this invention proposes a composite rotary thread self-locking structure. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] Existing solutions employ methods such as set screw fastening, applying fastening adhesive, and nylon self-locking. These solutions each have drawbacks, including increased assembly steps, difficulty in disassembly, and poor high-temperature resistance. To address these technical issues, this invention proposes a composite rotary thread self-locking structure.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a composite rotary thread self-locking structure, comprising an outer nut, an elastic retaining ring, an elastic body, a locking block, an inner nut, and a connecting member. The outer nut and the inner nut are connected in a mating manner. The elastic retaining ring is disposed inside the outer nut, and the elastic body is located inside the elastic retaining ring. The locking block is disposed on the inner nut and has a starting stop end face and a locking inclined surface. The inner nut has a locking stop end face that mates with the locking block. The connecting member is connected to the inner nut.

[0008] Preferably, the outer nut and the inner nut are connected by a threaded connection.

[0009] Preferably, the elastomer is made of elastic rubber.

[0010] Preferably, the starting stop end face cooperates with the locking stop end face to limit the initial position of the locking block.

[0011] Preferably, the locking bevel engages with the corresponding bevel of the inner nut to achieve the locking action between the locking block and the inner nut.

[0012] (III) Beneficial Effects

[0013] This invention provides a composite rotary thread self-locking structure. It has the following beneficial effects:

[0014] (1) The locking block and the elastic body are installed into the inner nut in sequence, then the outer nut is installed, the elastic retaining ring is inserted, and then the nut assembly is screwed into the connector to form a composite rotary thread self-locking structure, which realizes the functions of not increasing the assembly process, easy disassembly, high temperature resistance, and reliable thread locking. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the overall side structure of this utility model;

[0017] Figure 3 This is a side view of the present invention.

[0018] Figure 4 This is a side view of the present invention.

[0019] In the diagram: 1. Outer nut; 2. Elastic retaining ring; 3. Elastic body; 4. Locking block; 5. Inner nut; 6. Connecting piece; 7. Starting stop end face; 8. Locking inclined surface; 9. Locking stop end face. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0021] Please see Figure 1-4 This utility model provides a technical solution:

[0022] Example 1: A composite rotary thread self-locking structure includes an outer nut 1, an elastic retaining ring 2, an elastic body 3, a locking block 4, an inner nut 5, and a connecting piece 6. The outer nut 1 and the inner nut 5 are connected. The elastic retaining ring 2 is located inside the outer nut 1, and the elastic body 3 is located inside the elastic retaining ring 2. The locking block 4 is located on the inner nut 5 and has a starting stop end face 7 and a locking inclined surface 8. The inner nut 5 has a locking stop end face 9 that cooperates with the locking block 4. The connecting piece 6 is connected to the inner nut 5. The outer nut 1 and the inner nut 5 are connected by a threaded connection. The elastic body 3 is made of elastic rubber. The starting stop end face 7 cooperates with the locking stop end face 9 to limit the initial position of the locking block 4. The locking inclined surface 8 cooperates with the corresponding inclined surface of the inner nut 5 to realize the locking action of the locking block 4 and the inner nut 5.

[0023] Connector 6 remains stationary. During tightening, a wrench rotates the outer nut 1, causing the elastic body 3 to push the inner nut 5 and locking block 4 to rotate synchronously via the locking ramp 8. When the inner nut 5 is fully screwed into connector 6, the resistance increases rapidly after its end face contacts the end face of connector 6. At this time, the torque of the wrench also increases rapidly. When the pressure of the outer nut 1 on the elastic body 3 through the locking ramp 8 exceeds the rated design value of the elastic force of the elastic body 3, the elastic body 3 is compressed, pushing the locking block 4 to generate prestress between the internal thread of the locking block 4 and the external thread of connector 6, forming frictional resistance, causing the elastic body 3, locking block 4, and inner nut 5 to stop rotating. The outer nut 1 continues to rotate until it reaches the locking stop end face 9 and then stops rotating, completing the locking function. During disassembly, use a wrench to rotate the outer nut 1 in the opposite direction. At this time, the inner nut 5 is stationary. When the outer nut 1 rotates to the starting stop end face 7, the elastic body 3 springs up, and the pressure on the locking block 4 disappears. The locking block 4 causes the friction between the internal thread of the locking block 4 and the external thread of the connector 6 to disappear, and the thread is unlocked. After that, the outer nut 1 drives the inner nut 5 to rotate in the opposite direction until the nut assembly is unscrewed from the connector 6, and the disassembly is completed.

[0024] Working principle, as shown in the appendix Figure 1 During the tightening process, the outer nut 1 is rotated using a wrench. This rotation, via the locking bevel 8, causes the elastic body 3 to push the inner nut 5 and locking block 4 to rotate synchronously. Once the inner nut 5 is fully screwed into the connector 6, its end face contacts the end face of the connector 6, causing a rapid increase in resistance. At this point, the torque of the wrench also increases rapidly. (See attached image) Figure 2 When the pressure of the outer nut 1 on the elastic body 3 via the locking ramp 8 exceeds the rated design value of the elastic force of the elastic body 3, the elastic body 3 is compressed, pushing the locking block 4 to generate prestress between the internal thread of the locking block 4 and the external thread of the connecting piece 6, forming frictional resistance, causing the elastic body 3, locking block 4, and inner nut 5 to stop rotating. The outer nut 1 continues to rotate until it reaches the locking stop end face 9 and then stops rotating, completing the locking function, as shown in the attached diagram. Figure 2 .

[0025] As attached Figure 3 During disassembly, use a wrench to rotate the outer nut 1 in the opposite direction. At this time, the inner nut 5 remains stationary. When the outer nut 1 reaches the starting stop end face 7, the elastic body 3 springs up, and the pressure on the locking block 4 disappears. The locking block 4 causes the friction between its internal thread and the external thread of the connecting piece 6 to disappear, thus unlocking the thread. Afterward, the outer nut 1 drives the inner nut 5 to rotate in the opposite direction until the nut assembly is unscrewed from the connecting piece 6, completing the disassembly. (See attached diagram) Figure 4 .

[0026] A composite rotary thread self-locking structure is disclosed, comprising sequentially inserting a locking block 4 and an elastic body 3 into an inner nut 5, then installing an outer nut 1, engaging an elastic retaining ring 2, and finally screwing the nut assembly into a connecting piece 6, thus forming a composite rotary thread self-locking structure. This achieves the functions of no additional assembly steps, easy disassembly, high temperature resistance, and reliable thread locking.

[0027] It should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

Claims

1. A composite rotary thread self-locking structure, characterized in that: The device includes an outer nut (1), an elastic retaining ring (2), an elastic body (3), a locking block (4), an inner nut (5), and a connecting piece (6). The outer nut (1) is connected to the inner nut (5). The elastic retaining ring (2) is located inside the outer nut (1). The elastic body (3) is located inside the elastic retaining ring (2). The locking block (4) is located on the inner nut (5) and has a starting stop end face (7) and a locking inclined surface (8). The inner nut (5) has a locking stop end face (9) that cooperates with the locking block (4). The connecting piece (6) is connected to the inner nut (5).

2. The composite rotary thread self-locking structure according to claim 1, characterized in that: The outer nut (1) and the inner nut (5) are connected by a threaded connection.

3. The composite rotary thread self-locking structure according to claim 2, characterized in that: The elastomer (3) is made of elastic rubber.

4. The composite rotary thread self-locking structure according to claim 3, characterized in that: The starting stop end face (7) cooperates with the locking stop end face (9) to limit the initial position of the locking block (4).

5. A composite rotary thread self-locking structure according to claim 4, characterized in that: The locking inclined surface (8) cooperates with the corresponding inclined surface of the inner nut (5) to realize the locking action of the locking block (4) and the inner nut (5).

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