A type of anti-loosening locking screw

Abstract

This utility model relates to the field of screw technology and discloses an anti-loosening locking screw, including a threaded portion, a connecting portion coaxially mounted at the top end of the threaded portion, a nut mounted at the top end of the connecting portion, and springs inserted on both sides of the inner interior of the connecting portion; an arc-shaped plate connected to the outer end of the springs, with rubber balls laid on the outer side of the arc-shaped plate; a screw rod screwed to the bottom of the through groove, a bearing sleeved on the outside of the screw rod, and a pressing block sleeved on the outside of the bearing; and wedge-shaped blocks inserted on both sides of the inner interior of the through groove. This anti-loosening locking screw, by rotating the screw rod, drives the pressing block to move, which in turn pushes the wedge-shaped blocks, thereby pushing the arc-shaped plate and the rubber balls. This causes the rubber balls to press tightly into the thread groove, gradually filling the entire thread groove. The elastic deformation of the rubber material allows for a tight fit against the thread surface, forming a strong physical lock, effectively buffering the effects of external forces such as vibration and impact.

Description

Technical Field

[0001] This utility model relates to the field of screw technology, specifically to an anti-loosening locking screw. Background Technology

[0002] With the development of society, machinery has played an increasingly important role in people's daily life and production. Due to the convenience and precision of machinery, a lot of manpower and financial resources are saved. As a result, the screws used to connect the various parts of machinery have also become important. It can be said that machinery cannot function without these small parts. It is the combination of these small parts that makes machinery work safely and stably.

[0003] Common anti-loosening measures for screw threaded connections mostly rely on single friction damping or rigid clamping structures, such as locking washers that increase friction. However, these traditional methods are prone to stress relaxation under high-frequency vibration or dynamic loads and lack elastic compensation capabilities, making them unable to adapt to small changes in thread clearance, resulting in a gradual decrease in preload. On the other hand, methods that rely solely on friction are difficult to maintain a stable locking effect due to increased wear on the contact surface, and cannot meet the working requirements of screws. Therefore, an anti-loosening locking screw is proposed. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an anti-loosening locking screw to solve the technical problem that screws, which rely on a single friction damping or rigid snap-fit ​​structure for connection, lack elastic compensation capabilities and cannot adapt to minute changes in thread clearance.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an anti-loosening locking screw, comprising:

[0006] The threaded part has a connecting part coaxially mounted at its top end, and a nut is mounted at the top end of the connecting part. Springs are inserted into both sides of the inside of the connecting part.

[0007] An arc-shaped plate is connected to the outer end of the spring. Rubber balls are laid on the outer side of the arc-shaped plate. A through groove is opened inside the nut. The top of the arc-shaped plate passes through the inside of the through groove.

[0008] A screw is screwed to the bottom of a through groove. A bearing is fitted on the outside of the screw, and a pressing block is fitted on the outside of the bearing. Wedge-shaped blocks are inserted into both sides of the inside of the through groove.

[0009] Preferably, the number of rubber balls is 6-12 sets, and guide rods are connected to the inner side of the arc plate at positions corresponding to the springs. The guide rods are inserted into the springs, and the added guide rods improve the stability of the arc plate during movement.

[0010] Preferably, sliding grooves are provided on both sides of the bottom of the through groove at positions corresponding to the arc-shaped plate. The length of each sliding groove is four times the thickness of the arc-shaped plate, and the sliding grooves facilitate the movement of the arc-shaped plate.

[0011] Preferably, the outer ends of the wedge blocks are connected to the upper part of the corresponding arc plate, the wedge blocks on both sides are mirror images, and the lower sides of the extrusion block are provided with inclined surfaces that match the slope of the wedge blocks, which facilitates the movement of the wedge blocks while the extrusion block is pressing down.

[0012] Preferably, the surface of the rubber ball is provided with a honeycomb-shaped micro-protrusion structure, the inner wall of the groove is coated with a molybdenum disulfide lubricating layer, and the top of the arc plate extends beyond the top plane of the nut, which facilitates pressing the arc plate.

[0013] Preferably, a silicone pad is laid on the upper outer side of the arc plate, a snap-fit ​​groove is opened on the top of the screw, and the inner ends of the springs are connected to the corresponding positions of the inner walls of the connecting parts.

[0014] Compared with the prior art, the present invention provides an anti-loosening locking screw, which has the following beneficial effects:

[0015] This anti-loosening locking screw retracts by pressing the arc-shaped plate, allowing the threaded part to be screwed into the threaded hole. As the threaded part screws in, the connecting part is inserted into the threaded hole. Releasing the arc-shaped plate causes the arc-shaped plate and rubber ball to expand outward under the action of the spring force, bringing the rubber ball into contact with the thread groove. Then, rotating the screw drives the movement of the extrusion block, which in turn pushes the wedge block, pushing the arc-shaped plate and rubber ball. This causes the rubber ball to be pressed tightly into the thread groove, gradually filling the entire thread groove. The elastic deformation of the rubber material allows it to tightly adhere to the thread surface, forming a firm physical lock. This effectively buffers the effects of external forces such as vibration and impact, preventing relative displacement between the screw and the threaded hole, avoiding the risk of loosening after long-term use. Even under high-frequency vibration conditions, it can maintain the stability of the connection, significantly reducing equipment failures caused by loosening. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the nut and connecting part structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the internal structure of the nut of this utility model;

[0019] Figure 4 This is a schematic diagram of the bearing and screw structure of this utility model;

[0020] Figure 5 This is a cross-sectional view of the connecting part and nut structure of this utility model.

[0021] In the diagram: 1. Threaded part; 2. Connecting part; 3. Nut; 4. Spring; 5. Arc plate; 6. Rubber ball; 7. Through groove; 8. Wedge block; 9. Screw; 10. Bearing; 11. Extrusion block; 12. Slide groove; 13. Guide rod. Detailed Implementation

[0022] 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.

[0023] This utility model provides a technical solution: an anti-loosening locking screw, comprising a threaded portion 1, a connecting portion 2, a nut 3, a spring 4, an arc-shaped plate 5, a rubber ball 6, a through groove 7, a wedge-shaped block 8, a screw 9, a bearing 10, a pressing block 11, a sliding groove 12, and a guide rod 13.

[0024] Please see Figure 1 A connecting part 2 is coaxially mounted on the top end of the threaded part 1, and a nut 3 is mounted on the top end of the connecting part 2. Please refer to [link / reference]. Figure 2 Springs 4 are inserted into both sides of the inside of the connecting part 2;

[0025] The curved plate 5 is connected to the outer end of the spring 4. Rubber balls 6 are laid on the outer side of the curved plate 5. Please refer to [link / reference]. Figure 3 The nut 3 has a through groove 7 inside, and the top of the arc plate 5 passes through the inside of the through groove 7;

[0026] Please see Figure 4 The screw 9 is screwed to the bottom of the through groove 7. A bearing 10 is sleeved on the outside of the screw 9, and an extrusion block 11 is sleeved on the outside of the bearing 10. Please refer to [link / reference]. Figure 3 Both sides of the through groove 7 are fitted with wedge-shaped blocks 8. Please refer to [link / reference]. Figure 5 Slide grooves 12 are provided on both sides of the bottom of the through groove 7 at positions corresponding to the arc plate 5. The length of each slide groove 12 is four times the thickness of the arc plate 5.

[0027] Please see Figure 2The number of rubber balls 6 is 6-12 sets. Guide rods 13 are connected to the inner side of the arc plate 5 at positions corresponding to the spring 4. The guide rods 13 are inserted into the spring 4. The outer ends of the wedge blocks 8 are connected to the upper part of the arc plate 5 on the corresponding side. The two wedge blocks 8 are mirror images of each other. The lower sides of the extrusion block 11 have inclined surfaces that match the slope of the wedge blocks 8. By pressing the arc plate 5, it is retracted, so that the threaded part 1 can be screwed into the threaded hole normally. When the threaded part 1 is screwed in, the connecting part 2 is inserted into the threaded hole. After the arc plate 5 is released, the arc plate 5 and the rubber balls 6 can be driven by the elastic force of the spring 4. The expansion of the screw 9 causes the rubber ball 6 to contact the thread groove. Then, the screw 9 is rotated to drive the extrusion block 11 to move, which in turn pushes the wedge block 8, which in turn pushes the arc plate 5 and the rubber ball 6. This causes the rubber ball 6 to be pressed tightly into the inside of the thread groove, gradually filling the entire thread groove. The elastic deformation of the rubber material allows it to fit tightly against the thread surface, forming a firm physical lock. This effectively buffers the effects of external forces such as vibration and impact, prevents relative displacement between the screw and the screw hole, and avoids the risk of loosening after long-term use. Even under high-frequency vibration conditions, it can maintain the stability of the connection and greatly reduce equipment failures caused by loosening.

[0028] The surface of the rubber ball 6 is provided with a honeycomb-shaped micro-protrusion structure, the inner wall of the groove 12 is coated with a molybdenum disulfide lubricating layer, the top of the arc plate 5 extends beyond the top plane of the nut 3, a silicone pad is laid on the upper outer side of the arc plate 5, a snap-fit ​​groove is opened on the top of the screw 9, and the inner end of the spring 4 is connected to the corresponding position of the inner wall of the connecting part 2.

[0029] This solution involves pressing the arc-shaped plate 5 to retract it, allowing the threaded part 1 to be screwed into the threaded hole normally. As the threaded part 1 is screwed in, the connecting part 2 is inserted into the threaded hole. Releasing the arc-shaped plate 5 allows the arc-shaped plate 5 and the rubber ball 6 to expand outward under the elastic force of the spring 4, bringing the rubber ball 6 into contact with the thread groove. Then, rotating the screw 9 moves the extrusion block 11, which in turn pushes the wedge block 8, pushing the arc-shaped plate 5 and the rubber ball 6. This causes the rubber ball 6 to be pressed tightly into the thread groove, gradually filling the entire groove. The elastic deformation of the rubber material allows it to tightly adhere to the thread surface, forming a strong physical lock. This effectively buffers the effects of external forces such as vibration and impact, preventing relative displacement between the screw and the threaded hole, avoiding the risk of loosening after long-term use. Even under high-frequency vibration conditions, it can maintain the stability of the connection, significantly reducing equipment failures caused by loosening.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A locking screw for preventing loosening, characterized in that, include: A threaded part (1) is coaxially mounted with a connecting part (2) at the top end of the threaded part (1). A nut (3) is mounted at the top end of the connecting part (2). Springs (4) are inserted into both sides of the inside of the connecting part (2). An arc-shaped plate (5) is connected to the outer end of the spring (4). Rubber balls (6) are laid on the outer side of the arc-shaped plate (5). A through groove (7) is opened inside the nut (3). The top end of the arc-shaped plate (5) penetrates the inside of the through groove (7). A screw (9) is screwed to the bottom of the through groove (7). A bearing (10) is sleeved on the outside of the screw (9). An extrusion block (11) is sleeved on the outside of the bearing (10). Wedge blocks (8) are inserted into both sides of the inside of the through groove (7).

2. The anti-loosening locking screw according to claim 1, characterized in that: The number of rubber balls (6) is 6-12 sets. The inner side of the arc plate (5) is connected to the corresponding position of the spring (4) with a guide rod (13). The guide rod (13) is inserted into the inside of the spring (4).

3. A locking screw according to claim 1, wherein: The bottom sides of the through groove (7) are provided with sliding grooves (12) at positions corresponding to the arc plate (5), and the length of the sliding grooves (12) is four times the thickness of the arc plate (5).

4. The locking screw of claim 1 wherein: The outer ends of the wedge blocks (8) are connected to the upper part of the corresponding arc plate (5). The wedge blocks (8) on both sides are mirror images. The lower sides of the extrusion block (11) are provided with inclined surfaces that match the slope of the wedge blocks (8).

5. A locking screw according to claim 3, wherein: The surface of the rubber ball (6) is provided with a honeycomb micro-protrusion structure, the inner wall of the groove (12) is coated with a molybdenum disulfide lubricating layer, and the top of the arc plate (5) extends beyond the top plane of the nut (3).

6. A locking screw according to claim 1, wherein: The upper outer side of the arc plate (5) is covered with a silicone pad, the top of the screw (9) is provided with a snap-fit ​​groove, and the inner end of the spring (4) is connected to the corresponding position of the inner wall of the connecting part (2).

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