An eccentric quick locking nut for narrow space

Abstract

The utility model belongs to the technical field of fastener, disclose a eccentric quick locking nut for narrow space, including the nut body that is established as the cylindrical, the centre of nut body is equipped with the through hole that matches with the matched bolt, the inside of nut body is equipped with eccentric locking mechanism, eccentric locking mechanism includes the annular limit flange that establishes in the outside of nut body, one end of annular limit flang is connected with the eccentric drive ring of the sleeve that sets up in the outside of nut body through bearing, the inner hole of eccentric drive ring is established as eccentric circle hole, the inside of the lateral wall of nut body is seted up with the radial direction guide slot that links with through hole, the inside of radial direction guide slot is equipped with elastic locking assembly, elastic locking assembly includes locking block and driven block that establish in the inside of radial direction guide slot. The utility model through the cooperation and disposition of eccentric drive ring and elastic locking assembly, realize quick locking and disassembly without large angle rotation, improve the assembly efficiency under the environment of space limitation.

Description

Technical Field

[0001] This utility model relates to the field of fastener technology, and in particular to an eccentric quick-locking nut for use in confined spaces. Background Technology

[0002] In the fields of mechanical assembly, maintenance, and manufacturing, especially in extremely confined or limited-visibility working environments such as aerospace engine compartments, automotive chassis and suspension systems, precision instrument interiors, rail transit equipment maintenance ports, and military equipment maintenance, the installation and removal of traditional nuts face numerous technical bottlenecks: 1. Conventional wrenches, sockets, and other tools cannot reach or rotate to a sufficient angle, resulting in the inability to tighten or remove the nut, and even requiring the removal of surrounding components, significantly increasing operation time and costs; 2. Traditional nuts require multiple rotations to achieve axial locking, which is extremely inefficient in scenarios involving frequent assembly and disassembly or batch assembly; in some high-risk or special environments, operators need to hold the component steady with one hand and complete the tightening with the other, a requirement that traditional nuts cannot meet.

[0003] Although there are some quick-locking nuts on the market (such as eccentric nuts and snap-on nuts), they still have the following drawbacks: complex structure, many parts, large size, and difficulty in being used in extremely narrow spaces; they rely on special tools or external power sources. Utility Model Content

[0004] To overcome the technical defects of the existing technology, this utility model provides an eccentric quick-locking nut for use in confined spaces.

[0005] The technical solution adopted by this utility model is: an eccentric quick-locking nut for confined spaces, comprising a cylindrical nut body, the center of which has a through hole matching the mating bolt, and an eccentric locking mechanism inside the nut body; the eccentric locking mechanism includes an annular limiting flange on the outside of the nut body, one end of which is connected via a bearing to an eccentric drive ring sleeved on the outside of the nut body, the inner hole of the eccentric drive ring being an eccentric circular hole, and a radial guide groove communicating with the through hole being opened inside the side wall of the nut body, the radial guide groove containing an elastic locking component; the elastic locking component includes a locking block and a driven block inside the radial guide groove, the inner side of the locking block having a threaded section matching the mating bolt, and the outer wall of the driven block having an arc-shaped surface abutting against the inner wall of the eccentric circular hole.

[0006] Preferably, the elastic locking assembly further includes a limiting ring disposed inside the radial guide groove, and a connecting rod passing through the limiting ring is provided between the locking block and the driven block.

[0007] Preferably, a return spring is sleeved on the connecting rod between the driven block and the limiting ring.

[0008] Preferably, a solid lubricant gasket is provided between the outer side of the locking block and the inner wall of the eccentric circular hole of the eccentric drive ring.

[0009] Preferably, the annular limiting flange is provided with an elastic anti-rotation pin, and the eccentric drive ring is provided with a plurality of limiting grooves that are adapted to the inner end of the elastic anti-rotation pin.

[0010] Preferably, the outer cylindrical surface of the eccentric drive ring is provided with anti-slip texture or knurling.

[0011] The beneficial effects of this utility model are: 1. By combining the eccentric drive ring with the elastic locking component, fast locking and disassembly can be achieved without large-angle rotation, improving assembly efficiency in space-constrained environments. Since the outer wall of the driven block is designed as an arc surface, the rotational motion of the eccentric drive ring is smoothly and with low friction converted into the radial linear motion of the locking component, avoiding deflection or wedging of the locking block, and achieving the goal of fast, reliable, and one-handed operation in extremely confined spaces. 2. By using the matching of the limiting ring and the connecting rod, the connection stability between the locking block and the driven block is enhanced, preventing the locking block from deflecting or jamming during radial movement, improving the smoothness and reliability of the locking process, ensuring radial locking force while ensuring a fast and consistent reset action during unlocking, and saving axial and radial space. 3. The reset spring design allows the locking block to automatically reset during unlocking, enabling rapid disengagement from the bolt, further improving disassembly efficiency, and reducing manual intervention; 4. The cooperation between the elastic anti-rotation pin and the limiting groove can fix the position of the eccentric drive ring after locking, preventing loosening due to vibration or external force and enhancing the reliability of locking. Attached Figure Description

[0012] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0013] Figure 1 This is a schematic diagram of an eccentric quick-locking nut structure for use in confined spaces according to the present invention; Figure 2 This is a cross-sectional view of an eccentric quick-locking nut structure for use in confined spaces according to this utility model; Figure 3 This is a schematic diagram of the eccentric drive ring structure of this utility model.

[0014] Explanation of reference numerals in the attached drawings: 1. Nut body; 2. Through hole; 3. Eccentric locking mechanism; 4. Annular limiting flange; 5. Eccentric drive ring; 6. Eccentric circular hole; 7. Radial guide groove; 8. Elastic locking assembly; 9. Locking block; 10. Driven block; 11. Threaded section; 12. Limiting ring; 13. Connecting rod; 14. Return spring; 15. Elastic anti-rotation pin; 16. Limiting groove. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this utility model to facilitate a better understanding of this application. However, the technical solutions claimed in the claims of this application can be implemented even without these technical details and with various variations and modifications based on the following embodiments.

[0016] like Figure 1 , Figure 2 and Figure 3 As shown, this embodiment provides an eccentric quick-locking nut for confined spaces, including a cylindrical nut body 1. The nut body 1 has a through hole 2 at its center that matches the mating bolt. An eccentric locking mechanism 3 is provided inside the nut body 1. The eccentric locking mechanism 3 includes an annular limiting flange 4 located outside the nut body 1. One end of the annular limiting flange 4 is connected via a bearing to an eccentric drive ring 5 sleeved outside the nut body 1. The inner hole of the eccentric drive ring 5 is an eccentric circular hole 6. A radial guide groove 7 communicating with the through hole 2 is provided inside the side wall of the nut body 1. An elastic locking component 8 is provided inside the radial guide groove 7. The elastic locking component 8 includes... The locking block 9 and the driven block 10 are located inside the radial guide groove 7. The inner side of the locking block 9 is provided with a threaded section 11 that matches the mating bolt. The outer wall of the driven block 10 is provided with an arc-shaped surface that abuts against the inner wall of the eccentric circular hole 6. Through the cooperation of the eccentric drive ring 5 and the elastic locking assembly 8, fast locking and disassembly can be achieved without large-angle rotation, which improves the assembly efficiency in space-constrained environments. Since the outer wall of the driven block 10 is set as an arc-shaped surface, the rotational motion of the eccentric drive ring 5 is smoothly and with low friction converted into the radial linear motion of the elastic locking assembly 8, avoiding the locking block 9 from deflecting or wedging. This achieves the purpose of fast, reliable, and one-handed operation in extremely confined spaces.

[0017] The elastic locking assembly 8 also includes a limiting ring 12 disposed inside the radial guide groove 7. A connecting rod 13 passing through the limiting ring 12 is provided between the locking block 9 and the driven block 10. The matching arrangement of the limiting ring 12 and the connecting rod 13 enhances the connection stability between the locking block 9 and the driven block 10, prevents the locking block 9 from deflecting or getting stuck during radial movement, and improves the smoothness and reliability of the locking process.

[0018] The connecting rod 13 is fitted with a return spring 14 located between the driven block 10 and the limiting ring 12. The setting of the return spring 14 enables the locking block 9 to automatically reset when unlocking, thereby quickly disengaging from the bolt, further improving disassembly efficiency, and reducing manual intervention.

[0019] A solid lubricant pad is provided between the outer side of the locking block 9 and the inner wall of the eccentric circular hole 6 of the eccentric drive ring 5. The solid lubricant pad effectively reduces the friction between the locking block 9 and the inner wall of the eccentric circular hole 6, extends the service life, and improves the smoothness of operation. It is especially suitable for high-frequency or high-load use scenarios.

[0020] The annular limiting flange 4 is provided with an elastic anti-rotation pin 15, and the eccentric drive ring 5 is provided with a plurality of limiting grooves 16 that are adapted to the inner end of the elastic anti-rotation pin 15. The cooperation between the elastic anti-rotation pin 15 and the limiting grooves 16 can fix the position of the eccentric drive ring 5 after locking, prevent loosening due to vibration or external force, and enhance the locking reliability.

[0021] The outer cylindrical surface of the eccentric drive ring 5 is provided with anti-slip texture or knurling. The anti-slip texture or knurling design improves the manual operation feel of the eccentric drive ring 5, making it easier to apply force in narrow or humid environments, and enhancing practicality and human-computer interaction.

[0022] During operation, when the initial state is not locked, the return spring 14 is in a naturally extended state. The elastic force of the return spring 14 pushes the driven block 10 and the locking block 9 to the outermost radial position. The threaded section 11 on the inner surface of the locking block 9 does not contact the bolt. The nut body 1 can rotate along the bolt shaft thread to the specified position. The eccentric drive ring 5 is in the initial position. The inner wall of the eccentric circular hole 6 of the eccentric drive ring 5 maintains minimum contact pressure with the arc-shaped surface of the driven block 10. Locking process: The operator rotates the eccentric drive ring 5 clockwise through the anti-slip texture or knurling on the outer surface of the eccentric drive ring 5. The inner hole of the eccentric drive ring 5 is set as an eccentric circular hole 6. During the rotation, the inner wall of the eccentric drive ring 5 gradually presses against the arc-shaped surface of the driven block 10, pushing the driven block 10 to move towards the center along the radial guide groove 7. The driven block 10 drives the locking block 9 to move towards the center synchronously through the connecting rod 13. The threaded section 11 on the inner surface of the locking block 9 gradually engages with the bolt to achieve radial clamping. When the eccentric drive ring 5 rotates to the preset angle, the locking block 9 completely clamps the bolt, and the threaded section 11 forms a uniform surface contact with the bolt, providing a stable locking force. At this time, the elastic anti-rotation pin 15 automatically engages in the corresponding limit groove 16 on the eccentric drive ring 5 under the action of the spring to prevent the eccentric drive ring 5 from reversing and ensure that the locking state is durable and reliable. Unlocking process: Press or flick the elastic anti-rotation pin 15 with your finger to disengage the elastic anti-rotation pin 15 from the limiting groove 16. Rotate the eccentric drive ring 5 counterclockwise. The inner wall of the eccentric circular hole 6 gradually releases the pressure on the driven block 10. The return spring 14 pushes the driven block 10 and the locking block 9 to move radially outward. The locking block 9 disengages from the bolt thread. The nut body 1 can be moved out along the rotation axis of the bolt thread to complete the quick disassembly.

[0023] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0024] Those skilled in the art will understand that the above embodiments are specific examples of implementing the present invention, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of the present invention.

Claims

1. An eccentric quick-locking nut for use in confined spaces, characterized in that: It includes a cylindrical nut body (1), the center of which is provided with a through hole (2) that matches the mating bolt, and the interior of the nut body (1) is provided with an eccentric locking mechanism (3). The eccentric locking mechanism (3) includes an annular limiting flange (4) provided outside the nut body (1). One end of the annular limiting flange (4) is connected by a bearing to an eccentric drive ring (5) sleeved outside the nut body (1). The inner hole of the eccentric drive ring (5) is an eccentric circular hole (6). A radial guide groove (7) communicating with the through hole (2) is opened inside the side wall of the nut body (1). An elastic locking component (8) is provided inside the radial guide groove (7). The elastic locking assembly (8) includes a locking block (9) and a driven block (10) disposed inside the radial guide groove (7). The inner side of the locking block (9) is provided with a threaded section (11) that matches the mating bolt. The outer wall of the driven block (10) is provided with an arc-shaped surface that abuts against the inner wall of the eccentric circular hole (6).

2. The eccentric quick-locking nut for confined spaces according to claim 1, characterized in that: The elastic locking assembly (8) also includes a limiting ring (12) disposed inside the radial guide groove (7), and a connecting rod (13) passing through the limiting ring (12) is provided between the locking block (9) and the driven block (10).

3. An eccentric quick-locking nut for confined spaces according to claim 2, characterized in that: A return spring (14) is sleeved on the connecting rod (13) between the driven block (10) and the limiting ring (12).

4. The eccentric quick-locking nut for confined spaces according to claim 1, characterized in that: A solid lubricant gasket is provided between the outer side of the locking block (9) and the inner wall of the eccentric circular hole (6) of the eccentric drive ring (5).

5. An eccentric quick-locking nut for confined spaces according to claim 1, characterized in that: The annular limiting flange (4) is provided with an elastic anti-rotation pin (15), and the eccentric drive ring (5) is provided with a plurality of limiting grooves (16) that are adapted to the inner end of the elastic anti-rotation pin (15).

6. An eccentric quick-locking nut for confined spaces according to claim 1, characterized in that: The outer cylindrical surface of the eccentric drive ring (5) is provided with anti-slip texture or knurling.

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