High-strength limiting nut

Abstract

The utility model relates to the technical field of fasteners and discloses a high-strength limiting nut which comprises a bolt head, the surface of the bolt head is in threaded connection with a fixing nut, an inserting groove is formed in the surface of the bolt head, the inner wall of the inserting groove is in sliding connection with an inserting plate, a limiting assembly is arranged in the inserting groove, and the bottom end of the inserting plate is in sliding connection with a first sliding ring. A pressure spring is arranged at one end of the first sliding ring, and the bolt head is sleeved with the pressure spring; the fixing nut has the advantages that the pressing spring and the second sliding ring apply pressure to the fixing nut, the applied pressure can compensate the pre-tightening force, the fixing nut is prevented from loosening due to disappearance of the pre-tightening force, the inserting plate fixed through the limiting assembly blocks the loosened fixing nut, the fixing nut is prevented from falling off, the fixing nut is prevented from being lost, and the fixing nut is prevented from being damaged. And the two connected pieces are prevented from being completely separated, and harm caused by looseness of the fixing nut is reduced.

Description

Technical Field

[0001] The utility model relates to a limit nut, in particular to a high-strength limit nut, belonging to the technical field of fasteners. Background Technique

[0002] A nut is a part that cooperates with a bolt or screw rod to play a fastening role. Using a nut to tighten a bolt or screw rod is a conventional technique widely used in mechanical equipment. In the traditional method, the nut is tightened by rotating the thread in one direction and loosened by rotating the thread in the other direction.

[0003] Among them, the "high-strength and high-stability nut assembly" disclosed in the application number "202221959007.2" "comprises a flange nut, a hexagonal nut and a bolt. The bolt includes a main bolt and a bolt sleeve. The main bolt is formed with a slotted groove, and the bolt sleeve is provided with a limiting rod equal in number to the slotted groove. The side planes of the flange nut and the hexagonal nut are jointly formed with a plurality of limiting grooves, and limiting columns are formed in the limiting grooves, and limiting rods are arranged in the limiting grooves. The high-strength and high-stability nut assembly of the utility model, by screwing the flange nut and the hexagonal nut on the bolt sleeve and the main bolt, makes the threads of the flange nut and the hexagonal nut contact the threads of the bolt sleeve and the main bolt and are applied with a pre-tightening force, so that the flange nut and the hexagonal nut strengthen the resistance to the disappearance of the pre-tightening force caused by non-subjective reasons and the stability of the assembly position of the nut and bolt can still be maintained to a certain extent after the pre-tightening force is reduced, and the time required for the pre-tightening force to disappear after tightening the nut once is prolonged".

[0004] However, the existing method still has the following problems: the nut will still become loose due to the disappearance of the pre-tightening force after long-term use. Content of the Utility Model

[0005] The purpose of the utility model is to provide a high-strength limit nut to solve the problem that the existing nut will still become loose due to the disappearance of the pre-tightening force after long-term use.

[0006] To achieve the above purpose, the utility model provides the following technical solution: a high-strength limit nut, including a bolt head, the surface of the bolt head is threadedly connected with a fixing nut, a slot is opened on the surface of the bolt head, a plug board is slidably connected to the inner wall of the slot, a limiting component is arranged inside the slot, the bottom end of the plug board is slidably connected with a first sliding ring, one end of the first sliding ring is provided with a pressing spring, the pressing spring is sleeved outside the bolt head, one end of the pressing spring is provided with a second sliding ring, and one end of the second sliding ring is slidably connected with the bottom end of the fixing nut.

[0007] As a preferred technical solution of the present utility model, two anti - detachment grooves are provided at the bottom end of the plug board. An anti - detachment seat is slidably connected to the inner walls of the two anti - detachment grooves. The bottom end of the anti - detachment seat is connected to the top end of the first sliding ring. Polyurethane coatings are applied to the surface of the anti - detachment seat and the inner walls of the two anti - detachment grooves.

[0008] As a preferred technical solution of the present utility model, a clamping groove is provided on the surface of the second sliding ring. A clamping block is slidably connected to the inner wall of the clamping groove. The bottom end of the clamping block is connected to the top end of the fixing nut.

[0009] As a preferred technical solution of the present utility model, the limiting assembly includes a receiving groove, a driving assembly and two limiting grooves. The receiving groove is provided inside the plug board. Through grooves are provided on the front and back of the receiving groove. Two sliding bars are slidably connected to the inner wall of the receiving groove. Limiting blocks are provided on the front and back of the two sliding bars. The surfaces of the two limiting blocks are respectively slidably connected to the inner walls of the two through grooves.

[0010] As a preferred technical solution of the present utility model, the two limiting grooves are respectively provided on the front and back of the slot. The two limiting grooves are respectively engaged with the two limiting blocks. The interiors of the two limiting grooves are respectively communicated with the interiors of the two through grooves.

[0011] As a preferred technical solution of the present utility model, the driving assembly includes a bidirectional lead screw. The bidirectional lead screw is rotatably arranged on the inner wall of the receiving groove through a bearing. Both ends of the bidirectional lead screw penetrate through the inner wall of the receiving groove and are located outside the receiving groove. Connection discs are provided at both ends of the bidirectional lead screw. A rotation - assisting port is provided at one end of each of the two connection discs. The contact parts of the bidirectional lead screw and the two sliding bars are respectively connected by screw nuts in a threaded manner.

[0012] As a preferred technical solution of the present utility model, a blocking groove communicating with the inside of the slot is provided on the surface of the top of the bolt head. A blocking block is slidably connected to the inner wall of the blocking groove. The bottom end of the blocking block is connected to one side of the top end of the plug board.

[0013] As a preferred technical solution of the present utility model, an annular groove is provided on the surface of the bottom of the bolt head. A rubber ring is provided on the inner wall of the annular groove. The rubber ring is made of silicone rubber material. An anti - slip pattern is provided at one end of the rubber ring.

[0014] Compared with the related art, a high - strength limiting nut provided by the present utility model has the following beneficial effects:

[0015] 1. Apply pressure to the fixing nut through the compression spring and the second sliding ring. The applied pressure can compensate for the pre-tightening force, prevent the fixing nut from loosening due to the disappearance of the pre-tightening force, and block the loose fixing nut through the plug board fixed by the limiting component to prevent the fixing nut from falling off, which not only prevents the loss of the fixing nut but also prevents the two connected parts from being completely separated, reducing the harm caused by the loosening of the fixing nut.

[0016] 2. Block the block at the top of the plug board through the retaining groove on the surface of the bolt head to complete the alignment of the limiting groove and the through groove, improving the installation efficiency. Drive the connection disk to rotate through an external screwdriver. The connection disk drives the bidirectional lead screw to rotate. The bidirectional lead screw drives the two sliding bars to move. The two sliding bars drive the two limiting blocks to move, prompting the two limiting blocks to be respectively inserted into the two limiting grooves to complete the fixation of the plug board, which is very convenient. Brief Description of the Drawings

[0017] Figure 1 is a structural schematic diagram of the present utility model;

[0018] Figure 2 is a top view sectional structural schematic diagram of the present utility model;

[0019] Figure 3 is a structural schematic diagram of the driving component of the present utility model;

[0020] Figure 4 is an exploded structural schematic diagram of the first sliding ring of the present utility model;

[0021] Figure 5 is an exploded structural schematic diagram of the second sliding ring of the present utility model.

[0022] In the figure: 1. Bolt head; 2. Fixing nut; 3. Slot; 4. Plug board; 5. Limiting component; 51. Storage groove; 52. Limiting groove; 53. Sliding bar; 54. Limiting block; 55. Through groove; 6. Driving component; 61. Bidirectional lead screw; 62. Connection disk; 63. Auxiliary rotation port; 7. First sliding ring; 8. Compression spring; 9. Second sliding ring; 10. Anti-loosening groove; 11. Anti-loosening seat; 12. Card slot; 13. Card block; 14. Retaining groove; 15. Block; 16. Annular groove; 17. Rubber ring. Detailed Embodiment

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] Please refer to Figures 1-5, the present utility model provides a high-strength limit nut, including a bolt head 1, a fixing nut 2 is threadedly connected to the surface of the bolt head 1, a slot 3 is provided on the surface of the bolt head 1, a plug board 4 is slidably connected to the inner wall of the slot 3, a limiting component 5 is arranged inside the slot 3, a first sliding ring 7 is slidably connected to the bottom end of the plug board 4, one end of the first sliding ring 7 is fixedly provided with a compression spring 8, the compression spring 8 is sleeved outside the bolt head 1, one end of the compression spring 8 is fixedly provided with a second sliding ring 9, one end of the second sliding ring 9 is slidably connected to the bottom end of the fixing nut 2, the compression spring 8 is in a compressed state, one end of it is limited by the plug board 4 through the first sliding ring 7, and the other end of it is limited by the fixing nut 2 through the second sliding ring 9. The compression spring 8 applies pressure to the fixing nut 2 through the second sliding ring 9. The pressure applied by the compression spring 8 is used to compensate for the pre-tightening force to prevent the fixing nut 2 from loosening due to the disappearance of the pre-tightening force. Further, if the compression spring 8 is accidentally damaged and the pre-tightening force of the fixing nut 2 disappears, then the plug board 4 fixed by the limiting component 5 blocks the fixing nut 2 to prevent the fixing nut 2 from completely detaching from the bolt head 1, which not only prevents the loss of the fixing nut 2 but also prevents the two connected parts from being completely separated, reducing the harm caused by the loosening of the fixing nut 2.

[0025] Two anti-detachment grooves 10 are provided at the bottom end of the plug board 4, an anti-detachment seat 11 is slidably connected to the inner walls of the two anti-detachment grooves 10, the bottom end of the anti-detachment seat 11 is fixedly connected to the top end of the first sliding ring 7, polyurethane coatings are applied to the surface of the anti-detachment seat 11 and the inner walls of the two anti-detachment grooves 10 to increase friction. The plug board 4 positions the first sliding ring 7 through the anti-detachment grooves 10 and the anti-detachment seat 11 to prevent the top of the compression spring 8 from skewing.

[0026] Six clamping grooves 12 are provided on the surface of the second sliding ring 9, the inner walls of the six clamping grooves 12 are all slidably connected with clamping blocks 13, the bottom ends of the clamping blocks 13 are fixedly connected to the top end of the fixing nut 2, and the fixing nut 2 positions the second sliding ring 9 through the six clamping blocks 13 to prevent the bottom of the compression spring 8 from skewing.

[0027] The limiting component 5 includes a receiving groove 51, a driving component 6, and two limiting grooves 52. The receiving groove 51 is opened inside the plug board 4. Through grooves 55 are opened on both the front and back of the receiving groove 51. Two sliding bars 53 are slidably connected to the inner wall of the receiving groove 51. Limiting blocks 54 are fixedly arranged on both the front and back of the two sliding bars 53. The surfaces of the two limiting blocks 54 are respectively slidably connected to the inner walls of the two through grooves 55. The two limiting grooves 52 are respectively opened on the front and back of the socket 3. The two limiting grooves 52 are respectively engaged with the two limiting blocks 54. The interiors of the two limiting grooves 52 are respectively communicated with the interiors of the two through grooves 55. When the limiting block 54 is snapped into the limiting groove 52, the bolt head 1 will block the plug board 4 when pulling out the plug board 4 through the limiting groove 52 and the limiting block 54, preventing the plug board 4 from detaching from the socket 3. The limiting block 54 can retract into the interior of the receiving groove 51 through the through groove 55, thus facilitating the extraction of the plug board 4.

[0028] The driving component 6 includes a bidirectional lead screw 61. The bidirectional lead screw 61 is rotatably arranged on the inner wall of the receiving groove 51 through a bearing. Both ends of the bidirectional lead screw 61 penetrate the inner wall of the receiving groove 51 and are located outside the receiving groove 51. Connecting discs 62 are fixedly arranged at both ends of the bidirectional lead screw 61. A rotation assisting port 63 is opened at one end of each of the two connecting discs 62. The contact parts of the bidirectional lead screw 61 and the two sliding bars 53 are threadedly connected through screw nuts. Insert the screwdriver into the rotation assisting port 63, and then rotate the screwdriver. The screwdriver drives the connecting disc 62 to rotate. The connecting disc 62 drives the bidirectional lead screw 61 to rotate. The bidirectional lead screw 61 drives the two sliding bars 53 to move. The two sliding bars 53 drive the two limiting blocks 54 to move, prompting the two limiting blocks 54 to be respectively snapped into the two limiting grooves 52, completing the fixation of the plug board 4, which is very convenient.

[0029] A retaining groove 14 communicating with the interior of the socket 3 is opened on the surface of the top of the bolt head 1. A retaining block 15 is slidably connected to the inner wall of the retaining groove 14. The bottom end of the retaining block 15 is fixedly connected to one side of the top end of the plug board 4. Move the plug board 4. The plug board 4 drives the retaining block 15 to move. The plug board 4 slides along the inner wall of the socket 3 until the retaining block 15 reaches the retaining groove 14. At this time, the limiting groove 52 is aligned with the through groove 55. Therefore, through the cooperation of the retaining block 15 and the retaining groove 14, it is convenient to align the limiting groove 52 with the through groove 55, improving the installation efficiency.

[0030] An annular groove 16 is opened on the surface of the bottom of the bolt head 1. A rubber ring 17 is fixedly arranged on the inner wall of the annular groove 16. The rubber ring 17 is made of silicone rubber material. One end of the rubber ring 17 is provided with anti-slip lines. One end of the rubber ring 17 will closely adhere to the surface of one of the connected parts. The friction between the two is increased through the rubber ring 17, which is beneficial to increasing the pre-tightening force. Silicone rubber is acid-resistant, alkali-resistant, and high-temperature-resistant, with a long service life.

[0031] During use, first pass the bolt head 1 through the two connected parts from bottom to top in sequence, so that one end of the rubber ring 17 closely adheres to the surface of the connected part at the bottom. Then rotate the fixing nut 2 to press the fixing nut 2 against the surface of the connected part at the top. Then slide the second sliding ring 9 into place and engage the card slot 12 with the card block 13. The second sliding ring 9 and the compression spring 8 will be sleeved outside the bolt head 1. After that, press the first sliding ring 7 downward and insert the insertion plate 4 into the slot 3. The anti-detachment seat 11 will snap into the anti-detachment groove 10 after releasing the first sliding ring 7. Finally, insert the screwdriver into the auxiliary rotation port 63, then rotate the screwdriver. The screwdriver drives the connection disk 62 to rotate, the connection disk 62 drives the bidirectional lead screw 61 to rotate, the bidirectional lead screw 61 drives the two sliding bars 53 to move, and the two sliding bars 53 drive the two limiting blocks 54 to move, so that the two limiting blocks 54 are respectively snapped into the two limiting grooves 52 to complete the fixation of the insertion plate 4. The compression spring 8 will exert pressure on the fixing nut 2 through the second sliding ring 9. The pressure exerted by the compression spring 8 can compensate for the pre-tightening force to prevent the fixing nut 2 from loosening due to the disappearance of the pre-tightening force. Further, if the compression spring 8 is accidentally damaged and the pre-tightening force of the fixing nut 2 disappears, then the insertion plate 4 fixed by the limiting component 5 blocks the fixing nut 2 to prevent the fixing nut 2 from falling off, which not only prevents the loss of the fixing nut 2 but also prevents the two connected parts from completely separating, reducing the harm caused by the loosening of the fixing nut 2.

[0032] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-strength limit nut, comprising a bolt head (1), characterized in that, The surface of the bolt head (1) is threadedly connected with a fixing nut (2). A slot (3) is opened on the surface of the bolt head (1). The inner wall of the slot (3) is slidably connected with a plug board (4). A limiting component (5) is arranged inside the slot (3). The bottom end of the plug board (4) is slidably connected with a first sliding ring (7). One end of the first sliding ring (7) is provided with a pressing spring (8). The pressing spring (8) is sleeved outside the bolt head (1). One end of the pressing spring (8) is provided with a second sliding ring (9). One end of the second sliding ring (9) is slidably connected with the bottom end of the fixing nut (2).

2. The high-strength limit nut according to claim 1, wherein: Two anti - detachment grooves (10) are opened at the bottom end of the plug board (4). The inner walls of the two anti - detachment grooves (10) are slidably connected with an anti - detachment seat (11). The bottom end of the anti - detachment seat (11) is connected to the top end of the first sliding ring (7). The surfaces of the anti - detachment seat (11) and the inner walls of the two anti - detachment grooves (10) are both coated with a polyurethane coating.

3. The high-strength limit nut according to claim 1, characterized in that: A clamping groove (12) is opened on the surface of the second sliding ring (9). The inner wall of the clamping groove (12) is slidably connected with a clamping block (13). The bottom end of the clamping block (13) is connected to the top end of the fixing nut (2).

4. The high-strength limit nut according to claim 1, characterized in that: The limiting component (5) includes a storage groove (51), a driving component (6) and two limiting grooves (52). The storage groove (51) is opened inside the plug board (4). Through grooves (55) are opened on the front and back of the storage groove (51). Two sliding bars (53) are slidably connected to the inner wall of the storage groove (51). Limiting blocks (54) are arranged on the front and back of the two sliding bars (53). The surfaces of the two limiting blocks (54) are respectively slidably connected with the inner walls of the two through grooves (55).

5. The high-strength limit nut according to claim 4, wherein: The two limiting grooves (52) are respectively opened on the front and back of the slot (3). The two limiting grooves (52) are respectively engaged with the two limiting blocks (54). The interiors of the two limiting grooves (52) are respectively communicated with the interiors of the two through grooves (55).

6. The high-strength limit nut according to claim 4, wherein: The driving component (6) includes a bidirectional lead screw (61). The bidirectional lead screw (61) is rotatably arranged on the inner wall of the storage groove (51) through a bearing. Both ends of the bidirectional lead screw (61) penetrate through the inner wall of the storage groove (51) and are located outside the storage groove (51). Connecting disks (62) are arranged at both ends of the bidirectional lead screw (61). A rotating - assisting opening (63) is opened at one end of each of the two connecting disks (62). The contact parts of the bidirectional lead screw (61) and the two sliding bars (53) are both threadedly connected through screw nuts.

7. The high-strength limit nut according to claim 1, characterized in that: A retaining groove (14) communicated with the inside of the slot (3) is opened on the surface of the top of the bolt head (1). A retaining block (15) is slidably connected to the inner wall of the retaining groove (14). The bottom end of the retaining block (15) is connected to one side of the top end of the plug board (4).

8. The high-strength limit nut according to claim 1, wherein: An annular groove (16) is opened on the surface of the bottom of the bolt head (1). A rubber ring (17) is arranged on the inner wall of the annular groove (16). The rubber ring (17) is made of silicone rubber material. An anti - slip pattern is arranged at one end of the rubber ring (17).

Images