Locking nut capable of adjusting pretightening force

Abstract

The utility model relates to the technical field of fasteners, and discloses a locking nut capable of adjusting pretightening force, which comprises a main bolt, a gasket is sleeved outside the main bolt, a fastening component is arranged on the main bolt, the fastening component comprises a nut inner container, and the nut inner container is sleeved on the gasket. A nut inner container is arranged outside the main bolt in a threaded fit mode, the nut inner container is arranged inside a nut outer sleeve in a sleeved mode, and lug blocks are fixedly installed on the circular outer wall of the nut inner container and the circular outer wall of the nut outer sleeve. According to the locking nut capable of adjusting the pretightening force, in order to better fasten a workpiece, the fastening assembly is arranged, the nut inner container is arranged in the nut outer sleeve in a sleeved mode, the fastening bolt penetrates through the multiple sets of lug blocks, and then the fastening nut is tightened, so that the nut inner container and the nut outer sleeve are convenient to disassemble, assemble and replace; the nut inner container is in threaded fit with the exterior of the main bolt through the hexagonal block and a tool, friction force can be increased by matching with the rubber ring, and then a workpiece can be better fastened.

Description

Technical Field

[0001] This utility model relates to the field of fastener technology, specifically to a locking nut with adjustable preload. Background Technology

[0002] In many fields such as machinery manufacturing, construction engineering, and automotive industry, fasteners are the core components that connect various parts. Their performance directly affects the stability, safety and service life of the overall equipment. Lock nuts, as an important branch of fasteners, are widely used in scenarios that need to withstand vibration, impact or alternating loads for a long time due to their anti-loosening and tightening characteristics.

[0003] As modern industry continues to demand higher precision and reliability from equipment, the market has set higher standards for the fastening effect, ease of assembly and disassembly, and controllable preload of locking nuts, driving the development of locking nut technology towards multi-functionality and precision.

[0004] However, existing locking nuts have shortcomings in practical applications. On the one hand, traditional locking nuts are mostly integrated structures. When the internal threads of the nut are worn or the components are damaged, the entire nut needs to be replaced, which not only increases maintenance costs but also prolongs equipment downtime. On the other hand, existing locking nuts lack an effective preload monitoring mechanism. Operators usually rely on experience or general tools to judge the preload level, which makes it impossible to accurately control the preload. Excessive preload can easily cause deformation of the bolt or nut, while insufficient preload cannot meet the tightening requirements. This makes them unsuitable for precision equipment scenarios with strict requirements for preload accuracy. In view of this, we propose a locking nut with adjustable preload. Utility Model Content

[0005] The purpose of this invention is to provide a locking nut with adjustable preload to solve the problems mentioned in the background art.

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

[0007] An adjustable preload lock nut includes a main bolt, a washer sleeved on the outside of the main bolt, and a fastening assembly on the main bolt, the fastening assembly including:

[0008] The main bolt has an external threaded nut sleeve, which is fitted inside the outer nut sleeve.

[0009] Ear blocks are fixedly installed on the circular outer walls of the inner nut and outer nut, and fastening bolts pass through the inside of the ear blocks. Fastening nuts are threaded on the outside of the fastening bolts.

[0010] A hexagonal block is fixedly installed at the end of the nut outer sleeve away from the nut inner sleeve, and a rubber ring is fixedly installed at the end of the nut inner sleeve away from the nut outer sleeve.

[0011] In a further embodiment, the circular cross-sections of the main bolt, washer, inner nut, outer nut, hexagonal block, and rubber ring are coaxial.

[0012] In a further embodiment, multiple sets of the lugs, fastening bolts, and fastening nuts are provided, making the connection between the inner nut and the outer nut more secure.

[0013] In a further embodiment, multiple sets of the aforementioned ear blocks, fastening bolts, and fastening nuts are arranged in an equally spaced circular array with the center of the circular cross-section of the nut's inner liner as the array center.

[0014] In a further embodiment, the fastening bolt is provided with an auxiliary component, which includes a fixed cylinder. The fixed cylinder is fixedly installed on the side of the fastening bolt near the washer. A movable cylinder is slidably installed on the outside of the fixed cylinder. The two ends of a spring rod are fixedly installed between the inner walls of the fixed cylinder and the movable cylinder. A pressure sensor is fixedly installed on the outer wall of the fixed cylinder to better adjust the preload.

[0015] In a further embodiment, multiple sets of the fixed cylinder, the movable cylinder, the spring rod, and the pressure sensor are provided.

[0016] In a further embodiment, both ends of the fixed cylinder and the moving cylinder that are far apart are provided with disc-shaped protrusions, so that the moving cylinder can better contact the pressure sensor.

[0017] Compared with the prior art, this utility model provides a locking nut with adjustable preload, which has the following advantages:

[0018] 1. This adjustable preload locking nut, in order to better secure the workpiece, is equipped with a fastening assembly. The inner nut is fitted inside the outer nut, the fastening bolt is passed through multiple sets of lugs, and then the fastening nut is tightened. This makes it easy to disassemble and replace the inner nut and the outer nut. The inner nut is threaded onto the outside of the main bolt using hexagonal blocks and tools. The rubber ring increases the friction, thereby better securing the workpiece.

[0019] 2. This adjustable preload locking nut, in order to better adjust the preload, is equipped with an auxiliary component. When the inner nut gradually approaches and releases the outer wall of the workpiece to be fastened, it will drive the fixed cylinder to move synchronously, so that the moving cylinder is squeezed by the outer wall. The moving cylinder slides outside the fixed cylinder, and at the same time the spring rod is compressed and deformed, so that the outer wall of the moving cylinder will abut against the pressure sensor. Therefore, the tighter the fastening component is tightened, the larger the feedback value of the pressure sensor will be, and thus the preload can be better adjusted. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the overall structure of the present invention from another perspective;

[0022] Figure 3 This is an exploded view of part of the structure of this utility model;

[0023] Figure 4 This is an exploded view of the fastening component structure of this utility model;

[0024] Figure 5 This utility model Figure 4 Enlarged structural diagram of region A in the middle;

[0025] Figure 6 This is a schematic diagram of the auxiliary component structure of this utility model;

[0026] Figure 7 This is a cross-sectional view of the auxiliary component structure of this utility model.

[0027] Explanation of icon numbers:

[0028] 1. Main bolt; 2. Washer;

[0029] 3. Fastening components; 31. Nut inner liner; 32. Nut outer sleeve; 33. Lug; 34. Fastening bolt; 35. Fastening nut; 36. Hexagonal block; 37. Rubber ring;

[0030] 4. Auxiliary components; 41. Fixed cylinder; 42. Moving cylinder; 43. Spring rod; 44. Pressure sensor. Detailed Implementation

[0031] 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.

[0032] In this application, the term "above" indicates the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. It is primarily used to better describe this application and its embodiments, and is not intended to limit the indicated device, element, or component to having a specific orientation, or to construct and operate in a specific orientation. Furthermore, the term "above" may also be used in certain circumstances to indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances.

[0033] Please see Figures 1-7 This utility model provides a technical solution:

[0034] An adjustable preload lock nut includes a main bolt 1, and a washer 2 is sleeved on the outside of the main bolt 1.

[0035] In one embodiment of this utility model, a fastening assembly 3 is provided on the main bolt 1. The fastening assembly 3 includes a nut inner tube 31, which is threaded onto the outside of the main bolt 1. The nut inner tube 31 is fitted inside the nut outer tube 32. Lugs 33 are fixedly installed on the circular outer walls of both the nut inner tube 31 and the nut outer tube 32. A fastening bolt 34 passes through the lugs 33, and a fastening nut 35 is threaded onto the outside of the fastening bolt 34. A hexagonal block 36 is fixedly installed at the end of the nut outer tube 32 away from the nut inner tube 31. A rubber ring 37 is fixedly installed at one end of the nut sleeve 32. Furthermore, the circular cross-section centers of the main bolt 1, washer 2, nut inner liner 31, nut sleeve 32, hexagonal block 36, and rubber ring 37 are coaxial. Furthermore, four sets of lugs 33, fastening bolts 34, and fastening nuts 35 are provided to make the nut inner liner 31 and nut sleeve 32 more secure. Furthermore, the four sets of lugs 33, fastening bolts 34, and fastening nuts 35 are all arranged in a circumferential array with the circular cross-section center of the nut inner liner 31 as the array center.

[0036] In this embodiment, the inner nut liner 31 is first inserted into the outer nut liner 32, aligning the lugs 33 of both. Then, the fastening bolt 34 is passed through the aligned lugs 33, and the fastening nut 35 is tightened. This completes the assembly and fixation of the inner nut liner 31 and the outer nut liner 32. This structural design facilitates disassembly and replacement. After assembly, the inner nut liner 31 is threaded onto the outside of the main bolt 1 using the hexagonal block 36 and appropriate tools. During tightening, the rubber ring 37 at the end of the inner nut liner 31 contacts the workpiece surface. The rubber ring 37 effectively increases the friction between the inner nut liner and the workpiece, thereby enhancing the overall fastening effect and better securing the workpiece. Thus, when the internal threads of the nut are worn or the components are damaged, it is not necessary to replace the entire nut, avoiding increased maintenance costs and extending equipment downtime.

[0037] In one embodiment of this utility model, an auxiliary component 4 is provided on the fastening bolt 34. The auxiliary component 4 includes a fixed cylinder 41. The fixed cylinder 41 is fixedly installed on the side of the fastening bolt 34 near the washer 2. A movable cylinder 42 is slidably installed on the outside of the fixed cylinder 41. The two ends of a spring rod 43 are fixedly installed between the inner walls of the fixed cylinder 41 and the movable cylinder 42. A pressure sensor 44 is fixedly installed on the outer wall of the fixed cylinder 41 to better adjust the preload. Furthermore, four sets of fixed cylinders 41, movable cylinders 42, spring rods 43 and pressure sensors 44 are provided. Furthermore, a disc-shaped convex plate is provided at the two ends of the fixed cylinder 41 and the movable cylinder 42 that are far apart, so that the movable cylinder 42 can better contact the pressure sensor 44.

[0038] In this embodiment, when the inner nut 31 is gradually tightened on the main bolt 1 and approaches the outer wall of the workpiece to be fastened, it will drive the fixed cylinder 41 to move synchronously towards the workpiece. As tightening continues, the moving cylinder 42 will first contact the outer wall of the workpiece to be fastened and be squeezed, forcing the moving cylinder 42 to slide towards the fixed cylinder 41 from the outside of the fixed cylinder 41. During this process, the spring rod 43 between the inner walls of the fixed cylinder 41 and the moving cylinder 42 will undergo compression deformation due to the sliding of the moving cylinder 42; as the fastening assembly 3 is tightened more and more, the moving cylinder 42 will move towards the workpiece. As the compressive force on the moving cylinder 42 increases, the compression of the spring rod 43 also increases. The contact force between the outer wall of the moving cylinder 42 and the pressure sensor 44 gradually increases, and the feedback value of the pressure sensor 44 also increases accordingly. The operator can intuitively judge the magnitude of the preload based on the feedback value of the pressure sensor 44, thereby adjusting the preload. This allows for control over the magnitude of the preload, preventing excessive preload from causing structural deformation, and also preventing insufficient preload from failing to meet the fastening requirements. This better adapts to equipment scenarios with requirements for preload precision.

[0039] All standard parts used in this application can be purchased from the market. The specific connection methods of each part are all conventional methods such as riveting and welding that are mature in the prior art. In addition, the standard parts all adopt conventional models in the prior art.

[0040] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A locking nut with adjustable preload, comprising a main bolt (1), wherein a washer (2) is sleeved on the outside of the main bolt (1), characterized in that: The main bolt (1) is provided with a fastening assembly (3), the fastening assembly (3) comprising: Nut inner liner (31), the main bolt (1) is threaded with the nut inner liner (31), the nut inner liner (31) is sleeved inside the nut outer sleeve (32); Ear block (33), the inner nut (31) and outer nut (32) are both fixedly installed with ear block (33), a fastening bolt (34) passes through the inside of the ear block (33), and a fastening nut (35) is threaded on the outside of the fastening bolt (34). A hexagonal block (36) is fixedly installed at one end of the nut outer sleeve (32) away from the nut inner liner (31), and a rubber ring (37) is fixedly installed at one end of the nut inner liner (31) away from the nut outer sleeve (32).

2. The adjustable preload locking nut according to claim 1, characterized in that: The circular cross-sections of the main bolt (1), washer (2), nut inner liner (31), nut outer liner (32), hexagonal block (36), and rubber ring (37) are coaxial.

3. The adjustable preload locking nut according to claim 2, characterized in that: Multiple sets of ear blocks (33), fastening bolts (34) and fastening nuts (35) are provided.

4. The adjustable preload locking nut according to claim 3, characterized in that: The multiple sets of ear blocks (33), fastening bolts (34) and fastening nuts (35) are all arranged in an equally spaced circular array with the center of the circular cross-section of the nut inner tube (31) as the array center.

5. The adjustable preload locking nut according to claim 1, characterized in that: An auxiliary component (4) is provided on the fastening bolt (34). The auxiliary component (4) includes a fixed cylinder (41). The fixed cylinder (41) is fixedly installed on the side of the fastening bolt (34) near the washer (2). A movable cylinder (42) is slidably installed on the outside of the fixed cylinder (41). The two ends of a spring rod (43) are fixedly installed between the inner walls of the fixed cylinder (41) and the movable cylinder (42). A pressure sensor (44) is fixedly installed on the outer wall of the fixed cylinder (41).

6. The adjustable preload locking nut according to claim 5, characterized in that: Multiple sets of the fixed cylinder (41), the movable cylinder (42), the spring rod (43), and the pressure sensor (44) are provided.

7. The adjustable preload locking nut according to claim 5, characterized in that: Both ends of the fixed cylinder (41) and the movable cylinder (42) that are far apart are provided with disc-shaped protrusions.

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