CN220060212U - Lock bolt - Google Patents

Abstract

The utility model discloses a lockbolt which comprises a screw rod, wherein the screw rod is in threaded connection with a first nut, a second nut and a locking sleeve arranged between the first nut and the second nut, and the locking sleeve comprises a locking sleeve body, a first moving surface and a second moving surface. By arranging the first nut, the second nut and the locking sleeve, the second nut applies pressure to the locking sleeve, so that the locking sleeve is subjected to radial pressure under the action of the pressing pressure, radial shrinkage deformation is further generated under the action of the radial pressure, the first moving surface and the second moving surface move in opposite directions, the radial pressure between the locking sleeve and the screw is increased, the friction force between the locking sleeve and the screw is greatly increased, and the locking sleeve is prevented from loosening; the contact surface of the locking sleeve cone and the second nut cone can generate larger friction force under the action of the pressing force, so that the second nut is prevented from loosening, loosening of a bolt under the dynamic state can be effectively prevented, and the long-term anti-loosening effect is achieved.

Description

Lock bolt

Technical Field

The utility model relates to the field of fasteners, in particular to a lockbolt.

Background

In the field of fasteners, bolts are a type of fastener with wider application range, are connected with each other through screw threads and nuts, and are used for pressing and fixing a fastening member by rotating the nuts, and the fixing mode is simple and convenient and has wider application scene;

however, after the bolt is fastened for a certain period of time, the nut is often loosened due to external force factors such as vibration, the nut is loosened, so that a fastening member is separated from a fastening state, and potential safety hazards are brought when the fastening member is serious, so that the lockbolt is generated and has a wider application range rapidly; the anti-loosening bolt is anti-loosening in a double-nut fixing mode, anti-loosening through adding anti-loosening gaskets and the like, and aims to cope with the loosening caused by external vibration, and the anti-loosening mode also fails to bring a good anti-loosening effect for a long time.

In summary, through the massive search of the applicant, at least the lockbolt in the prior art cannot bring a better locking effect for a long time in the field, so that development or improvement of a lockbolt is needed.

Disclosure of Invention

Based on the problem that the lockbolt in the prior art cannot bring a good locking effect for a long time, the utility model provides the lockbolt, which has the following specific technical scheme:

the utility model provides a lockbolt, includes the screw rod, screw rod threaded connection first nut, second nut, set up the lock sleeve between first nut and second nut, the lock sleeve includes the lock sleeve body, sets up on the lock sleeve body and makes first movable surface and the second movable surface that move in opposite directions when the lock sleeve body is pressed deformation.

Further, the first moving surface and the second moving surface are parallel to each other.

Further, the projection shape of the first moving surface is an S shape, a straight line shape or a broken line shape; the projection shape of the second moving surface is S-shaped, straight line-shaped or broken line-shaped.

Further, the first moving surface is arranged in a certain included angle with the bottom plane of the locking sleeve body; the second movable surface is arranged at an angle with the bottom plane of the locking sleeve body.

Further, the arrangement direction of the first moving surface is perpendicular to the plane of the bottom of the locking sleeve body; the second moving surface is perpendicular to the bottom plane of the locking sleeve body in arrangement.

Further, the first moving surface is obliquely arranged relative to the bottom plane of the locking sleeve body; the second moving surface is obliquely arranged relative to the bottom plane of the locking sleeve body.

Further, the projection shape of the first moving surface is a straight line, the setting direction of the first moving surface is inclined relative to the bottom plane of the locking sleeve body, and the inclination direction is the same as the thread setting direction of the locking sleeve body; the projection shape of the second moving surface is a straight line, the setting direction of the second moving surface is inclined relative to the plane of the bottom of the locking sleeve body, and the inclination direction is the same as the thread setting direction of the locking sleeve body.

Further, the locking sleeve body comprises a bottom ring and a jogged ring arranged on the bottom ring; the second nut comprises a second nut connecting end in threaded connection with the bolt and an embedded end fixedly connected with the second nut connecting end, and the bottom ring is mutually abutted with the embedded end; the embedded ring is embedded in the embedded end; one end of the jogged ring is mutually abutted with the inner surface of the connecting end of the second nut.

Further, one side of the bottom ring is mutually abutted with the first nut.

Further, the first moving surface and the second moving surface are correspondingly formed with grooves.

According to the technical scheme, the locking sleeve comprises the locking sleeve body, the first moving surface and the second moving surface through the arrangement of the first nut, the second nut and the locking sleeve. The second nut applies pressure to the locking sleeve, so that the locking sleeve is subjected to the action of the pressing force to generate radial pressure, radial shrinkage deformation is further generated under the action of the radial pressure, the first moving surface and the second moving surface move in opposite directions, the radial pressure between the locking sleeve and the screw is increased, the friction force between the locking sleeve and the screw is greatly increased, and loosening of the locking sleeve is prevented; in addition, the contact surface of the locking sleeve and the second nut can generate larger friction force under the action of the pressing force, so that the second nut is prevented from loosening, the loosening of the bolt under the dynamic state can be effectively prevented, and the long-term anti-loosening effect is achieved.

Drawings

FIG. 1 is a schematic cross-sectional view of a check bolt of the present utility model;

FIG. 2 is a schematic view of the mating structure of the locking sleeve and the second nut of the present utility model;

FIG. 3 is a schematic view of the structure of the locking sleeve of the present utility model;

FIG. 4 is a schematic top view of the locking sleeve of the present utility model;

FIG. 5 is a schematic illustration of the slotted construction of the present utility model;

FIG. 6 is another schematic structural view of the slot of the present utility model;

fig. 7 is a schematic diagram of a fold line structure of the present utility model.

Reference numerals illustrate:

1-a first nut; 2-a second nut; 3-a locking sleeve; 5-screw; 31-a locking sleeve body; 311-a first moving surface; 312-a second moving surface; 313-slotting; 9-fastening members; 32-a bottom ring; 33-a chimeric ring; 21-a second nut connection end; 22-chimeric ends; 51-external threads; 314—first internal threads; 211-second internal thread.

Detailed Description

The present utility model will be described in further detail with reference to the following examples thereof in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the detailed description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the utility model.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

The terms "first" and "second" in this specification do not denote a particular quantity or order, but rather are used for distinguishing between similar or identical items.

As shown in fig. 1 to 4, an anti-loosening bolt according to an embodiment of the present utility model includes a threaded rod 5, which is screwed with a first nut 1, a second nut 2, and a locking sleeve 3 disposed between the first nut 1 and the second nut 2, wherein the locking sleeve 3 includes a locking sleeve body 31, a first moving surface 311 and a second moving surface 312 disposed on the locking sleeve body 31 and moving in opposite directions when the locking sleeve body 31 is deformed by compression, and the first moving surface 311 and the second moving surface 312 form grooves 313 correspondingly. In which slots 313 extend through the locking collar body 31 from top to bottom. By arranging the first nut 1, the second nut 2 and the locking sleeve 3, the second nut 2 applies pressure to the locking sleeve 3, and the locking sleeve 3 has elasticity and deforms when being pressed; the radial pressure is generated by the action of the compression force on the locking sleeve 3, radial shrinkage deformation is further generated under the action of the radial pressure, the first moving surface 311 and the second moving surface 312 move in opposite directions, the radial pressure between the locking sleeve 3 and the screw 5 is increased, the friction force between the locking sleeve 3 and the screw 5 is greatly increased, loosening of a bolt under dynamic can be effectively prevented, and a long-term anti-loosening effect is achieved.

In one embodiment, as shown in fig. 1-4, the first moving surface 311 and the second moving surface 312 are disposed parallel to each other. When the locking sleeve is used, the locking sleeve body 31 deforms due to the fact that the second nut 2 applies pressure, so that the first moving surface 311 and the second moving surface 312 move in opposite directions, radial pressure between threads of the locking sleeve 3 and threads on the screw 5 is increased, friction between the locking sleeve 3 and the screw 5 is greatly increased, and loosening of a bolt under dynamic conditions can be effectively prevented. Meanwhile, the stress points of the first moving surface 311 and the second moving surface 312 are more uniform during movement, and the locking and anti-loose effects are better.

In one embodiment, as shown in fig. 3-7, the projected shape of the first moving surface 311 is an "S" shape, a straight line shape, or a polygonal line shape; the projected shape of the second moving surface 312 is an "S" shape, a straight line shape, or a polygonal line shape. The setting of multiple shapes can deal with different processing demands and a plurality of different stress points exist in the vertical direction, so that the fastening effect is improved, and the anti-loosening fastening effect is achieved.

In one embodiment, as shown in fig. 1 to 5, the first moving surface 311 is disposed in a direction forming a certain included angle with the bottom plane of the locking sleeve body 31; the second moving surface 312 is disposed at an angle to the bottom plane of the lock sleeve body 31. The first moving surface 311 and the second moving surface 312 respectively form a certain included angle with the bottom plane of the locking sleeve body 31, and the arrangement mode can meet different processing requirements and stress points are more uniform when the first moving surface 311 and the second moving surface 312 move, so that each force application point of the locking sleeve 31 to the screw 5 is more uniform, friction force is increased, and loosening can be effectively prevented.

In one embodiment, as shown in fig. 3, the first moving surface 311 is disposed in a direction perpendicular to the bottom plane of the locking sleeve body 31; the second moving surface 312 is disposed perpendicular to the bottom plane of the lock sleeve body 31. This kind of setting mode is being convenient for process, and simple structure easily realizes, makes lock sleeve 31 lock screw rod 5 through first movable surface 311, the opposite movement of second movable surface 312 to reach locking effect.

In one embodiment, as shown in fig. 5, the first moving surface is disposed in an inclined direction relative to the bottom plane of the locking sleeve body; the second moving surface is obliquely arranged relative to the bottom plane of the locking sleeve body. The slope sets up can deal with different processing demands and has a plurality of different stress points in vertical direction, improves fastening effect, reaches the effect of locking fastening.

In one embodiment, as shown in fig. 5, the projection shape of the first moving surface 311 is a straight line, and the first moving surface 311 is disposed in a direction inclined with respect to the bottom plane of the locking sleeve body 31 and in the same direction as the screw thread of the locking sleeve body 31; the projection shape of the second moving surface 312 is a straight line, and the setting direction of the second moving surface 312 is inclined with respect to the bottom plane of the locking sleeve body 31 and the inclination direction is the same as the thread setting direction of the locking sleeve body 31. The setting direction of the first moving surface 311 and the setting direction of the second moving surface 312 are the same as the setting direction of the screw thread of the locking sleeve body, the first moving surface 311 and the second moving surface 312 are in contact with the external screw thread arranged on the screw 5, and the locking sleeve 31 is blocked from moving reversely when the screw 5 is forced, so that the effect of preventing looseness reversely is achieved.

In one embodiment, as shown in fig. 2, the locking sleeve body 31 includes a bottom ring 32 and a fitting ring 33 disposed on the bottom ring 32; the second nut 2 comprises a second nut connecting end 21 in threaded connection with the bolt 5 and a jogged end 22 fixedly connected with the second nut connecting end 21, and the bottom ring 32 is mutually abutted with the jogged end 22; the jogging ring 33 is jogged and arranged in the jogging end 22; one end of the engaging ring 32 abuts against the inner surface of the second nut connecting end 21. The outer surface of the jogged ring 33 is in contact with the inner surface of the jogged end 22, and when in use, the jogged ring 33 is deformed by contact with each other, so that the locking sleeve body 31 is deformed, the deformation direction moves towards the central axis, and the first moving surface 311 and the second moving surface 312 move towards each other, thereby achieving the effect of preventing the loosening of the whole fastening device by the locking screw 31.

In one embodiment, as shown in fig. 2, one side of the bottom ring 32 abuts against the first nut 1. The first nut 1 limits the bottom ring 32 to move from one side of the bottom, so that the fastening effect is improved, and a better anti-loosening effect is achieved.

In one embodiment, as shown in fig. 1-3, the screw 5 is provided with an external thread 51; the inner surface of the locking sleeve body 31 is provided with a first internal thread 314 which is mutually connected with the external thread 51; the second nut connecting end 21 is provided on an inner surface thereof with a second female screw 211 which is connected to the male screw 51.

In one embodiment, as shown in fig. 2, the cross-sectional diameter of the engaging ring 33 gradually decreases from the contact surface of the bottom ring 32 to the other side, and the cross-sectional shape thereof is tapered, so that the locking sleeve 3 is tapered and has elasticity; the section diameter of the embedded end 22 gradually increases from the second nut connecting end 21 to the other side, and the section shape of the embedded end is conical; the embedded end 22 and the embedded ring 33 are embedded with each other in use, wherein a certain interference exists between the embedded end 22 and the embedded ring 33, the purpose of preventing loosening is achieved, the contact surface of the embedded ring 33 and the embedded end 22 generates larger friction force under the condition that each component is fastened, the friction force is larger than loosening extrusion stress generated by vibration during fastening of the bolt, the loosening of the second nut 2 is effectively prevented, and the purpose of preventing the loosening of the bolt is achieved through the interaction of the tightening force. Under the action of torsion, the locking sleeve 3 is fastened on the screw 5, and the second nut 2 generates friction force with the embedded ring 33 and the embedded end 22 under the action of the fastening force, so that the second nut 2 is prevented from loosening; under dynamic conditions, the positive pressure of the bolt generated by the embedded ring 33 and the embedded end 22 in the radial direction is in direct proportion to the vibration extrusion stress generated by the structure, the larger the vibration extrusion stress generated by the structure is, the more tightly embedded the embedded ring 33 and the embedded end 22 are, the larger the positive pressure generated by the radial direction of the bolt is, and the larger the friction force generated by the positive pressure is, so that the bolt is not loosened due to the factor of load change, and the purpose that the bolt never loosens is achieved. The embedded ring is mutually abutted with the embedded end, and the bottom ring is mutually abutted with the tail end of the embedded end; the anti-loosening effect is better, the force is exerted longitudinally and transversely, a plurality of force points are provided, and the anti-loosening effect is better.

When the screw is used, the screw rod 5 is assembled and penetrates through the fastening member 9, one end of the screw rod 5 is in threaded connection with the first nut 1 firstly, and the threaded connection method is according to the GB/T1231-2006 bolt torque standard or the Q/STB12.521.5-2000 metric bolt tightening torque; and then the locking sleeve 3 is twisted to reach the standard pretightening force, and finally the second nut 2 is twisted to reach the pretightening force.

By arranging the first nut 1, the second nut 2 and the locking sleeve 3, the second nut 2 applies pressure to the locking sleeve 3, so that the locking sleeve 3 is subjected to radial pressure by the action of the compression force, radial shrinkage deformation is further generated under the action of the radial pressure, the first moving surface 311 and the second moving surface 312 move in opposite directions, the radial pressure between the locking sleeve 3 and the screw 5 is increased, the friction force between the locking sleeve 3 and the screw 5 is greatly increased, and loosening of the locking sleeve 3 is prevented; the contact surface of the cone of the locking sleeve 3 and the cone of the second nut 2 can generate larger friction force under the action of the compression force to prevent the second nut 2 from loosening, so that the loosening of the bolt under the dynamic state can be effectively prevented, and the long-term anti-loosening effect is achieved.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (8)

1. The locking bolt comprises a screw rod and is characterized in that the screw rod is in threaded connection with a first nut, a second nut and a locking sleeve arranged between the first nut and the second nut, and the locking sleeve comprises a locking sleeve body, a first moving surface and a second moving surface, wherein the first moving surface and the second moving surface are arranged on the locking sleeve body and move in opposite directions when the locking sleeve body is deformed under pressure;

the first moving surface and the second moving surface are arranged in parallel;

the projection shape of the first moving surface is S-shaped, straight line-shaped or broken line-shaped; the projection shape of the second moving surface is S-shaped, straight line-shaped or broken line-shaped.

2. The lockbolt of claim 1, wherein the first moving surface is disposed in a direction that forms an angle with a bottom plane of the locking sleeve body; the second movable surface is arranged at an included angle with the plane at the bottom of the locking sleeve body.

3. The lockbolt of claim 2, wherein the first moving surface is disposed in a direction perpendicular to a bottom plane of the locking sleeve body; the second moving surface is perpendicular to the bottom plane of the locking sleeve body in arrangement.

4. The lockbolt of claim 2, wherein the first moving surface is disposed in a direction inclined with respect to a bottom plane of the locking sleeve body; the second moving surface is obliquely arranged relative to the bottom plane of the locking sleeve body.

5. The lockbolt according to claim 2, wherein the projection shape of the first moving surface is a straight line, and the first moving surface is arranged obliquely relative to the bottom plane of the locking sleeve body and in the same direction as the thread of the locking sleeve body; the projection shape of the second moving surface is a straight line, the setting direction of the second moving surface is inclined relative to the plane of the bottom of the locking sleeve body, and the inclination direction is the same as the thread setting direction of the locking sleeve body.

6. The lockbolt of claim 1, wherein the locking sleeve body comprises a bottom ring and a mating ring disposed on the bottom ring; the second nut comprises a second nut connecting end in threaded connection with the bolt and an embedded end fixedly connected with the second nut connecting end, and the bottom ring is mutually abutted with the embedded end; the embedded ring is embedded in the embedded end; one end of the jogged ring is mutually abutted with the inner surface of the connecting end of the second nut.

7. The lockbolt of claim 6, wherein one side of the bottom ring abuts the first nut.

8. The lockbolt of claim 1, wherein the first and second moving surfaces are grooved.