Bolt and nut anti-loose sleeve assembly with barrier strip
By designing a bolt and nut anti-loosening sleeve assembly with a stop bar, and utilizing the serrated groove and hexagonal groove structure, the problem of bolts and nuts loosening under vibration conditions is solved, achieving a simple and economical anti-loosening effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-14
- Publication Date
- 2026-03-17
AI Technical Summary
Existing technologies are difficult to effectively prevent bolts and nuts from loosening under severe vibration conditions, especially when there are protrusions or depressions in the workpiece structure near the bolts and nuts. Traditional anti-loosening solutions are complex and difficult to apply on a large scale.
Design a bolt and nut anti-loosening sleeve assembly with a stop bar, including a nut retaining sleeve and a bolt head retaining sleeve. Utilizing a serrated groove and hexagonal groove structure, the interaction between the stop bar and the workpiece structure prevents the bolt and nut from rotating, thus achieving an anti-loosening effect.
It achieves effective prevention of bolts and nuts from loosening under vibration environment with simple structure and low cost, thus enhancing the reliability of fastening.
Smart Images
Figure CN121676558A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of mechanical engineering. BACKGROUND
[0002] Threaded fasteners are widely used for fastening connection between various mechanical structures. In order to prevent loosening of bolts and nuts under severe vibration conditions, many anti-loosening methods are used in engineering, but generally there are problems of complex structure and difficult large-scale application. In actual engineering, there are often many geometric structures of workpieces near the fastening bolts and nuts, such as protruding workpiece structures higher than the plane fastened by the bolts and nuts or sunken workpiece structures lower than the plane fastened by the bolts and nuts. Therefore, for the fastening bolts and nuts in the above working environment, the structure scheme of the bolts and nuts can be greatly simplified by using the surrounding environment structure, and it is very meaningful to invent a mechanical structure which is simple in structure and can completely prevent loosening of the bolts and nuts. SUMMARY
[0003] The technical problem to be solved by the present application is to provide a bolt and nut anti-loosening sleeve assembly with a blocking strip which is simple in structure and can completely prevent loosening of the fastening bolts and nuts, for the fastening bolts and nuts near the protruding workpiece structures higher than the plane fastened by the bolts and nuts or the sunken workpiece structures lower than the plane fastened by the bolts and nuts.
[0004] In order to achieve the above-mentioned purpose, the technical solution of the present application is to provide a bolt and nut anti-loosening sleeve assembly with a blocking strip, which comprises a nut fixing sleeve 1 and a bolt head fixing sleeve 2, the nut fixing sleeve 1 is an annular sheet, characterized in that the center has a circular hole 101 with edges composed of sawtooth grooves, the edge of the annular sheet has one or several first blocking strips 102 which are straight or L-shaped, the bolt head fixing sleeve 2 is a circular sheet, characterized in that the center has a hexagonal recess 201, the center of the recess has a bolt hole 202, and the edge of the circular sheet has one or several second blocking strips 203 which are straight or L-shaped.
[0005] The technical points of the present application are as follows: first, the bolt and nut anti-loosening sleeve assembly with a blocking strip can fix the bolts and nuts, and the vicinity of the bolts and nuts has protruding workpiece structures higher than the plane fastened by the bolts and nuts or sunken workpiece structures lower than the plane fastened by the bolts and nuts, because the first blocking strip 102 and the second blocking strip 203 are blocked from rotating to the left direction by the side surfaces of the protruding or sunken workpiece structures, thereby achieving the function of preventing loosening of the bolts and nuts. Second, because the outer side surface of the bolt head and the nut has six edges, the number of sawtooth grooves of the circular hole 101 is an integer multiple of six, because the six edges of the outer side surface of the bolt and nut can be firmly clamped in the sawtooth grooves at the same time, thereby achieving the function of preventing loosening of the bolts and nuts.
[0006] The advantages of this invention are: 1. Simple and reliable structure. 2. Low cost and simple manufacturing. Attached Figure Description
[0007] The invention will be further described below with reference to the accompanying drawings.
[0008] Figure 1 This is a schematic diagram of a bolt and nut anti-loosening sleeve assembly with a retaining strip according to the present invention.
[0009] Figure 2 To utilize the workpiece structure with a protrusion near the bolt and nut that is higher than the plane fastened by the bolt and nut, the first stop bar 102 and the second stop bar 203 adopt a straight anti-loosening sleeve assembly diagram.
[0010] Figure 3 for Figure 2 A bottom view.
[0011] Figure 4 To utilize the recessed workpiece structure near the bolt and nut, which is lower than the plane fastened by the bolt and nut, the first stop bar 102 and the second stop bar 203 adopt an L-shaped stop bar anti-loosening assembly diagram.
[0012] Figure 5 A schematic diagram of the structure of the anti-detachment functional component.
[0013] Figure 6 This is a schematic diagram of the installation of the anti-detachment functional components.
[0014] Figure 7 The diagram shows the structure and installation of the stop plate 5.
[0015] In the attached diagram: 1. Nut retaining sleeve 1, 101. Circular hole 101 with serrated grooves on the edge, 102. First stop bar 102; 2. Bolt head retaining sleeve 2, 201. Hexagonal groove 201, 202. Bolt hole 202, 203. Second stop bar 203; 3. Anti-loosening hexagonal ring 3, 301. Hexagonal through hole 301, 302. First limiting plate 302; 4. Anti-loosening retaining ring 4, 401. Threaded hole 401, 402. Second limiting plate 402; 5. Stop plate 5. Detailed Implementation
[0016] like Figure 1As shown, a bolt and nut anti-loosening sleeve assembly with retaining strips is provided, comprising a nut retaining sleeve 1 and a bolt head retaining sleeve 2. The nut retaining sleeve 1 is an annular piece, characterized by a circular hole 101 with serrated grooves at its center and one or more straight or L-shaped first retaining strips 102 at its edge. The bolt head retaining sleeve 2 is a circular piece, characterized by a hexagonal groove 201 at its center with a bolt hole 202 at the center of the groove, and one or more straight or L-shaped second retaining strips 203 at its edge. In specific implementation of this technical solution, as follows... Figure 2 As shown, taking full advantage of the workpiece structure where there is a protrusion near the bolt and nut to be fixed that is higher than the plane to which the bolt and nut are fastened, a nut fixing sleeve 1 with a straight first stop 102 and a bolt head fixing sleeve 2 with a straight second stop 203 are selected. First, the bolt shank is inserted into the bolt hole 202 of the bolt head fixing sleeve 2, and the six edges on the outer side of the bolt head are inserted into the hexagonal groove 201. Then, the bolt shank is passed through the workpiece to be fastened. Because the bolt will rotate to the left when it is loose, the bolt shank must be rotated to the left after passing through the workpiece during installation to adjust the bolt, thereby causing the second stop 203 on the edge of the bolt head fixing sleeve 2 to rotate to the left. The end of the second stop bar 203 is placed against the side of the protruding workpiece structure near the left side. The workpiece is then secured by tightening the nut onto the bolt. The nut fixing sleeve 1, with its serrated grooves forming a circular hole 101, is then fitted over the six edges of the nut's outer side, simultaneously locking the six edges of the nut's outer side into the serrated grooves. Similarly, since the nut will rotate to the left when loosened, a suitable serrated groove is selected within the circular hole 101. The purpose is to lock the six edges of the nut's outer side while ensuring that the left side of the first stop bar 102 is as close as possible to the side of the protruding workpiece structure that is higher than the nut's fastening plane. The assembly is now complete. Under vibration conditions, when the nut loosens and rotates to the left, the side of the protruding workpiece structure higher than the nut's fastening plane will block the first stop bar 102 of the nut fixing sleeve 1, preventing it from rotating to the left. Furthermore, the circular hole 101 with serrated grooves locks the six edges of the nut's outer side, preventing the nut from rotating to the left and achieving the purpose of preventing loosening. Similarly, under vibration conditions, when the bolt loosens and rotates to the left, the side of the protruding workpiece structure above the bolt fastening plane will block the second stop 203 on the edge of the bolt head fixing sleeve 2 from rotating to the left. Furthermore, the hexagonal groove 201 will further lock the bolt head, preventing it from rotating to the left, thus simultaneously preventing both the bolt and nut from loosening. Figure 3 The image shown is a bottom view of the assembly process, providing a better observation of the installation process of the bolt head retaining sleeve 2, the state of the hexagonal groove 201 locking the bolt head, and the bolt's anti-loosening principle. (See image below.) Figure 4As shown, when utilizing a workpiece structure with a recessed area near the bolt and nut that is lower than the plane to which the bolt and nut are fastened, an anti-loosening sleeve assembly is selected, consisting of an L-shaped nut retaining sleeve 1 (first stop 102) and an L-shaped bolt head retaining sleeve 2 (second stop 203). The purpose is to allow the L-shaped sleeve to be inserted into the workpiece with the recessed structure and abut against the side of the recessed workpiece. The installation process and anti-loosening principle are the same as for straight stop types. Figure 5 As shown, considering situations such as severe vibration or downward installation of the nut, the nut retaining sleeve 1 may detach from the nut. In this case, an anti-detachment hexagonal ring 3 and an anti-detachment retaining ring 4 can be added. The anti-detachment hexagonal ring 3 is a hexagonal ring characterized by a hexagonal through hole 301 in the center and one or more first limiting plates 302 on the edge of the hexagonal ring. The anti-detachment retaining ring 4 is a hexagonal or circular ring plate characterized by a threaded hole 401 in the center and one or more second limiting plates 402 on the edge of the ring plate. Figure 6 As shown, the assembly process is as follows: After the nut retaining sleeve 1 is installed, first, the hexagonal through hole 301 of the anti-loosening hexagonal ring 3 is fitted onto the six edges of the nut side and pressed onto the nut retaining sleeve 1. Then, the threaded hole 401 of the anti-loosening retaining ring 4 is screwed onto the bolt rod and rotated to tighten until the anti-loosening retaining ring 4 is pressed tightly onto the anti-loosening hexagonal ring 3. After appropriate adjustment, the second limiting plate 402 is bent downwards until the end of the second limiting plate 402 bent downwards is stuck behind the first limiting plate 302, and the entire assembly is completed. Because the nut is currently in a state where it cannot rotate, the anti-loosening hexagonal ring 3 and the first limiting plate 302 fitted onto the nut are also in a state where they cannot rotate. Therefore, the first limiting plate 302 will block the second limiting plate 402 from rotating counterclockwise, and thus the anti-loosening retaining ring 4 cannot rotate counterclockwise and fall off the bolt rod, thereby pressing down the lower anti-loosening hexagonal ring 3 and the nut retaining sleeve 1 so that they cannot fall off the nut. Figure 7As shown, in practical applications where two or more adjacent fastening nuts or bolts are close together, a stop plate 5 with two or more bolt holes can be installed under the nut or bolt head. The bolt passes through the bolt holes on the plate, preventing the stop plate 5 from rotating. Then, the side of the stop plate 5, or holes machined into the plate, or protruding blocks machined into the plate, are used to prevent the first stop bar 102 and the second stop bar 203 from rotating to the left, achieving the purpose of preventing loosening. The advantage of this is that it artificially creates protruding or recessed structures, rather than relying on protruding or recessed structures near the fastened workpiece to prevent the rotation of the first stop bar 102 and the second stop bar 203. In practical applications, the shapes of the first stop bar 102 and the second stop bar 203 can be selected according to the actual working conditions. They can both be straight, both L-shaped, or one straight and one L-shaped, or the shape can be determined according to the actual working conditions. In practical applications, sometimes only the nut needs to be prevented from loosening, while the bolt itself is fixed. In such cases, using a nut fixing sleeve 1 is sufficient to achieve the anti-loosening goal. In practical applications, some working conditions only have bolt fasteners and no nuts. In this case, it is sufficient to use a nut retainer 1 to fix the bolt head.
[0017] The scope of protection of this invention should not be considered as limited to the specific forms described in the embodiments. The scope of protection of this invention also extends to equivalent technical means that can be conceived by those skilled in the art based on the concept of this invention, and those that do not change the structural principle should also be within the scope of protection of this invention.
Claims
1. A bolt and nut anti-loosening sleeve assembly with a stopper, characterized in that The bolt nut anti-loose sleeve assembly with the stop strip comprises a nut fixing sleeve (1) and a bolt head fixing sleeve (2), the nut fixing sleeve (1) is an annular sheet, and the characteristic is that a circular hole (101) with a sawtooth groove edge is arranged at the center, the annular sheet edge is provided with one or more first stop strips (102) which are flat or L-shaped, the bolt head fixing sleeve (2) is a circular sheet, and the characteristic is that a hexagonal groove (201) is arranged at the center, the groove center is provided with a bolt hole (202), and the circular sheet edge is provided with one or more second stop strips (203) which are flat or L-shaped.
2. A bolt and nut anti-loose sleeve assembly with a blocking strip according to claim 1, considering the situation that the nut fixing sleeve (1) will fall off from the nut, at this time, an anti-falling hex ring (3) and an anti-falling blocking ring (4) can be added, the anti-falling hex ring (3) is a hexagonal ring, characterized in that The middle is a hexagonal through hole (301), the hexagonal ring edge is provided with one or more first limiting plates (302), the anti-falling retaining ring (4) is a hexagonal or circular sheet, and the characteristic is that a threaded hole (401) is arranged at the center, and the sheet edge is provided with one or more second limiting plates (402).
3. The bolt nut anti-loose sleeve assembly with the stop strip according to claim 1, in actual application, when two or more adjacent fastening nuts or bolt positions are close, a stop plate (5) with two or more bolt holes can be installed below the nut or bolt head, the screw rod passes through the bolt hole on the plate, so that the stop plate (5) cannot rotate, then the side surface of the stop plate (5) or the hole or the protruding stop block processed on the plate is used to block the left rotation of the first stop strip (102) and the second stop strip (203), and the anti-loose purpose is achieved.
4. The bolt nut anti-loose sleeve assembly with the stop strip according to claim 1, in actual application, the shapes of the first stop strip (102) and the second stop strip (203) can be selected according to actual working conditions, and the flat shape can be used at the same time, or the L-shaped can be used at the same time, or one is flat and the other is L-shaped.
5. The bolt nut anti-loose sleeve assembly with the stop strip according to claim 1, in actual application, only the nut needs to be prevented from loosening, and the bolt itself is fixed, so only the nut fixing sleeve (1) needs to be used to achieve the anti-loose purpose.
6. The bolt nut anti-loose sleeve assembly with the stop strip according to claim 1, in actual application, some working conditions only have bolt fasteners without nuts, at this time, only the bolt head part is fixed by using the nut fixing sleeve 1.