CN211009522U - Bolt anti-loosening assembly - Google Patents

Abstract

The utility model discloses a bolt anti-loosening assembly, which mainly comprises a seat ring (1) and a pressing sleeve (2), when a threaded fastener (12) is screwed, acting force can force the pressing sleeve (2) to move towards the seat ring (1), and then the diameter of a cylindrical through hole (6) can be continuously reduced, so that the pressing sleeve (2) is tightly wrapped on the threaded fastener (12) to play the anti-loosening role; in addition, by observing the position of the annular groove (3), the torque applied to the threaded fastener (12) can be conveniently controlled.

Description

Bolt anti-loosening assembly

Technical Field

The utility model relates to a fastening connection spare that uses when mechanical parts connects, concretely relates to locking subassembly of bolt.

Background

As is known, threaded connections are a common connection in mechanical devices. Commonly used connectors are fasteners such as bolts, screws, studs, and the like. Although they can play a good fastening role, in normal use, the threads are loosened due to mechanical vibration and other reasons, so that the connection of a mechanical structure is damaged, and in severe cases, mechanical failure is caused, thereby causing adverse effects on national property and personal safety. In addition, during the assembly process, bolts with different sizes should be fastened by using different torques, and the standard of the torques should refer to mechanical design handbook. When the bolt is fastened, the standard torque specified in a mechanical design manual is adopted, so that a good fastening effect can be achieved, and the bolt can be prevented from being damaged due to excessive force. At present, if a constructor does not use tools such as a torque wrench, the size of torque used when a bolt is fastened cannot be controlled.

In the prior art, methods such as electric welding anti-loosening, thread fastening glue, stop gaskets and the like are commonly used for thread anti-loosening. The bolt head is easy to be locally overheated by adopting an electric welding anti-loosening mode, so that the material structure of the bolt head is changed, and the mechanical property is obviously reduced; the method of fastening the glue by threads has higher requirements on the glue and can not be used repeatedly; the locking gasket is the most common method at present, but the existing gasket is too simple in structure and poor in reliability, particularly cannot display the torque when a bolt is fastened, and is not beneficial to improving the assembling quality of mechanical equipment.

Disclosure of Invention

In view of the above problem, the utility model aims at providing a locking subassembly of bolt, suggestion constructor adopts standard moment to remove fastening bolt when the bolt is locking, improves mechanical equipment's assembly quality and work efficiency.

The utility model relates to a bolt locking subassembly, its characterized in that: the bolt anti-loosening assembly mainly comprises a seat ring (1) and a pressing sleeve (2); wherein the seat ring (1) mainly comprises a limiting piece (8), a second conical surface (9), a conical through hole (10) and a supporting surface (11); the pressing sleeve (2) mainly comprises an annular groove (3), an open slot (4), a first conical surface (5), a cylindrical through hole (6) and a stress surface (7), wherein the annular groove (3) is formed in one side, close to the stress surface (7), of the outer surface of the pressing sleeve (2), and the bottom of the annular groove (3) in the pressing sleeve (2) is an arc surface; the threaded fastener (12) firstly penetrates through the pressing sleeve (2), then penetrates through the seat ring (1) and the bolt hole of the first connecting piece (15), and is screwed in the threaded hole (14) of the second connecting piece (16), wherein the diameter of the screw of the threaded fastener (12) is slightly smaller than that of the cylindrical through hole (6); the limiting piece (8) is arranged in the open slot (4), and the first conical surface (5) and the second conical surface (9) are tightly attached; the rubber ring (13) is sleeved on the annular groove (3); when the threaded fastener (12) is screwed in the threaded hole (14), the threaded fastener (12) can exert an acting force on the stress surface (7) to force the pressing sleeve (2) to move towards the seat ring (1), so that the first conical surface (5) and the second conical surface (9) are pressed more and more tightly, and the reaction force of the second conical surface (9) can be transmitted to the pressing sleeve (2) through the first conical surface (5); because the pressing sleeve (2) is provided with the open slot (4), the diameter of the cylindrical through hole (6) is continuously reduced by the counterforce, so that the pressing sleeve (2) is tightly wrapped on the threaded fastener (12); the hardness of the material selected by the pressing sleeve (2) should be less than that of the material of the threaded fastener (12), and after the pressing sleeve is pressed, indentation and plastic deformation can occur on the inner surface of the cylindrical through hole (6), so that the anti-loosening effect is achieved.

When the bolt anti-loose assembly is manufactured, a designer can determine the standard installation torque in advance according to the size of the threaded fastener (12), and then determine the distance between the annular groove (3) and the stress surface (7) by calculating plastic deformation. When the threaded fastener (12) is screwed, the pressing sleeve (2) is gradually pressed into the seat ring (1), and when the annular groove (3) is about to disappear, the threaded fastener (12) reaches the standard torque specified in a mechanical design manual, so that various performances are optimal. It can be seen that the annular recess (3) acts like a standard graduation mark, allowing the builder to know in time whether he has installed the threaded fastener (12) in place. In order to enable the annular groove (3) to play a better indicating role, the rubber ring (13) with bright color is sleeved on the annular groove (3), so that a constructor can observe the position of the annular groove (3) more intuitively. Through the technical conception, the threaded fasteners (12) with different specifications can be controlled to adopt the uniform and standard screwing torque in the construction process, so that the assembling quality of mechanical equipment is improved.

Since the first conical surface (5) and the second conical surface (9) are both conical surfaces, the portion closer to the threaded hole (14) is pressed more severely, and the deformation is larger. In order to control the deformation of the pressing sleeve (2) and play a role in protecting the pressing sleeve (2) and the threaded fastener (12), a limiting piece (8) is designed on the seat ring (1), the shape of the limiting piece is a convex isosceles trapezoid, and the bottom edge of the trapezoid with shorter length is arranged on the supporting surface (11); the limiting piece (8) is arranged in the open slot (4), if the open slot (4) is too large in shrinkage deformation, the limiting piece can be propped against the limiting piece (8), and the threaded fastener (12) is not screwed, so that the pressing sleeve (2) and the threaded fastener (12) are indirectly protected.

The utility model has the advantages that: the bolt anti-loosening assembly can not only play a reliable anti-loosening effect; the screw tightening torque applied to the threaded fastener (12) can meet the design standard or not, and the assembly quality can be better controlled; in addition, the pressing sleeve (2) and the threaded fastener (12) can be prevented from being damaged due to overlarge screwing torque, and a safety effect is achieved.

Drawings

Fig. 1 is a schematic structural view of a bolt loosening prevention assembly.

FIG. 2 is an enlarged view of a portion of the bolt anti-loosening assembly.

Fig. 3 is a three-view of the press sleeve.

FIG. 4 is a half sectional view of the race.

Fig. 5 is a three-dimensional view of the race.

Fig. 6 is a half sectional view of the rubber ring.

Detailed Description

The invention will be further described in connection with the use of the examples, which are given by way of illustration only and are not to be construed as limiting the invention.

As shown in fig. 1, the bolt loosening prevention assembly is mainly composed of: the seat ring (1) and the pressing sleeve (2); before use, a bolt anti-loosening assembly with a proper size is selected according to the specification of the threaded fastener (12), and then the bolt anti-loosening assembly is assembled for use; when the threaded fastener is used, the threaded fastener (12) firstly penetrates through the pressing sleeve (2) and then penetrates through bolt holes in the seat ring (1) and the first connecting piece (15) and is screwed in a threaded hole (14) of the second connecting piece (16), wherein the limiting piece (8) is arranged in the open slot (4) and the first conical surface (5) and the second conical surface (9) are tightly attached. According to related research results and experience, the conicity of the first conical surface (5) and the second conical surface (9) can be controlled between 6 degrees and 12 degrees, and the best extrusion effect can be obtained.

As shown in figure 1, the design is simple and easy to implement, and can be used for mass production of threaded fasteners (12) with different specifications, so that a constructor can intuitively control the fastening torque without using special tools such as a torque wrench and the like, and the installation quality of subsequent work is ensured. When the bolt anti-loosening assembly is manufactured, a designer can determine an optimal mounting torque value in the working process in advance according to the specification and the size of the threaded fastener (12), and then determine the distance between the annular groove (3) and the stress surface (7) by calculating plastic deformation. When the threaded fastener (12) is screwed, the pressing sleeve (2) is gradually pressed into the seat ring (1), and when the annular groove (3) is about to disappear, the threaded fastener (12) achieves the standard torque specified in the mechanical design manual, so that the optimal fastening effect is obtained. It can be seen that the annular recess (3) acts like a standard graduation mark, allowing the builder to know in time whether he has installed the threaded fastener (12) in place. Through the technical conception, the screwing torque of the threaded fasteners (12) with different specifications can be controlled in the construction process, so that the assembling quality of mechanical equipment is improved. The threaded fastener (12) is a generic concept and may be a single-headed bolt, a screw, or a stud and nut combination, etc.

In order to enable the annular groove (3) to have a better indicating function, a colored rubber ring (13) is sleeved on the annular groove (3), so that a constructor can more visually observe the position of the annular groove (3); wherein the color of the rubber ring (13) is preferably striking red, and the material is preferably fluororubber with good corrosion resistance. As shown in figure 2, the bottom of the annular groove (3) is an arc surface, when the rubber ring (13) is sleeved on the annular groove (3), because the binding surface is the arc surface, the width of the rubber ring (13) is larger, the rubber ring is not easy to misplace, and the service life of the rubber ring (13) can be effectively prolonged. If the manufacturing conditions permit, the annular groove (3) can be painted with colors or other materials can be attached, so as to replace the function of the rubber ring (13).

As shown in figure 3, the pressure sleeve (2) is provided with an open slot (4), which is beneficial to the pressure sleeve (2) to shrink towards the screw rod direction when being extruded, and finally to be locked on the screw rod of the threaded fastener (12) to play a better anti-loose function. When the locking device is used, the limiting piece (8) on the seat ring (1) penetrates through the open slot (4) on the pressing sleeve (2), wherein the width of the open slot (4) on the pressing sleeve (2) is larger than that of the limiting piece (8) on the seat ring (1), a gap is reserved between the open slot and the pressing sleeve, so that the pressing sleeve (2) can freely contract towards the screw rod when being extruded, and the locking effect of locking the screw rod is achieved. In order to ensure the anti-loosening effect of the bolt anti-loosening assembly, the material hardness of the pressing sleeve (2) is necessarily smaller than that of the threaded fastener (12), and a plastic material such as tetrafluoroethylene or nylon is preferably selected, so that the anti-loosening effect can be ensured, and the threads cannot be damaged.

As shown in fig. 4, a limit piece (8) is designed on the seat ring (1), the shape of the limit piece is a convex isosceles trapezoid, and the bottom side with the shorter length of the trapezoid is arranged on the supporting surface (11); the design is that the deformation of the pressing sleeve (2) is larger at the position closer to the supporting surface (11) in the use process; the limiting piece (8) is designed into a convex isosceles trapezoid which just accords with the deformation rule of the pressing sleeve (2), so that the space of the part with large deformation of the pressing sleeve (2) is large, and the space of the part with small deformation is small; when the pressing sleeve (2) deforms to a certain degree, the pressing sleeve is propped against the limiting piece (8), the pressing sleeve (2) is prevented from being damaged due to excessive deformation, and a safety function is achieved; the threaded fastener (12) is also not tightened at this time, thereby ensuring that the threaded fastener (12) is not over-tightened. Wherein the hardness of the material of the seat ring (1) is larger than that of the material of the pressing sleeve (2).

Claims (9)

1. The utility model provides a bolt locking subassembly which characterized in that: the bolt anti-loosening assembly mainly comprises a seat ring (1) and a pressing sleeve (2); wherein the seat ring (1) mainly comprises a limiting piece (8), a second conical surface (9), a conical through hole (10) and a supporting surface (11); the pressing sleeve (2) mainly comprises an annular groove (3), an open slot (4), a first conical surface (5), a cylindrical through hole (6) and a stress surface (7); the seat ring (1) and the pressing sleeve (2) are matched for use, in the using process, a threaded fastener (12) firstly penetrates through the pressing sleeve (2) and then penetrates through the seat ring (1) to be in threaded connection with a connecting piece, wherein the first conical surface (5) and the second conical surface (9) are attached to each other, and the limiting piece (8) is arranged in the open slot (4); in the working process, the threaded fastener (12) can exert acting force on the stress surface (7) to force the pressing sleeve (2) to move towards the inner side of the seat ring (1), so that the first conical surface (5) and the second conical surface (9) are pressed more and more tightly, the reaction force of the second conical surface (9) can be transmitted to the pressing sleeve (2) through the first conical surface (5), the diameter of the cylindrical through hole (6) can be continuously reduced through the reaction force, and the pressing sleeve (2) is tightly wrapped on the threaded fastener (12); the hardness of the material selected by the pressing sleeve (2) is less than that of the material of the threaded fastener (12), so that the inner surface of the cylindrical through hole (6) is subjected to plastic deformation, and the anti-loosening effect is achieved.

2. A bolt loosening prevention assembly as defined in claim 1, wherein: the side wall of the pressing sleeve (2) is provided with an open slot (4).

3. A bolt loosening prevention assembly as defined in claim 1, wherein: the width of the open slot (4) on the pressing sleeve (2) is larger than that of the limiting piece (8) on the seat ring (1), and a gap exists between the open slot and the limiting piece.

4. A bolt loosening prevention assembly as defined in claim 1, wherein: one side of the outer surface of the pressure sleeve (2) close to the stress surface (7) is provided with an annular groove (3).

5. A bolt loosening prevention assembly as defined in claim 1, wherein: a limiting piece (8) is arranged on the second conical surface (9) of the seat ring (1), the shape of the limiting piece (8) is a convex isosceles trapezoid, and the bottom edge with the shorter length of the trapezoid is arranged on the supporting surface (11) of the seat ring (1).

6. A bolt loosening prevention assembly as defined in claim 1, wherein: the bottom of the annular groove (3) on the pressing sleeve (2) is an arc surface.

7. A bolt loosening prevention assembly as defined in claim 1, wherein: the rubber ring (13) is sleeved on the annular groove (3) of the pressing sleeve (2).

8. A bolt loosening prevention assembly as defined in claim 1, wherein: the material of the pressing sleeve (2) is preferably plastic.

9. A bolt loosening prevention assembly as defined in claim 1, wherein: the hardness of the material of the seat ring (1) is greater than that of the material of the pressing sleeve (2).

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