CN223621985U - Lock bolt and vehicle - Google Patents

Abstract

This application relates to the field of connector technology, and particularly to an anti-loosening bolt and vehicle, comprising: a rod body with a mounting groove formed along its length; a nut disposed at one end of the rod body; at least one locking block slidably fitted into the mounting groove in a direction perpendicular to the length of the rod body; and an elastic element disposed within the mounting groove, with its two ends connected to the locking block and the inner wall of the mounting groove, respectively. By providing a mounting groove on the rod body and equipping it with a slidable locking block and an elastic element, an anti-loosening mechanism is achieved, whereby the locking block retracts when the nut is tightened and springs back to its original position to prevent the nut or bolt from loosening after the nut is loosened.

Description

Lock bolt and vehicle

Technical Field

The application relates to the technical field of connecting pieces, in particular to a lockbolt and a vehicle.

Background

In the technical field of connecting pieces, the locking technology of bolts is always an important point. The existing bolt locking technology in the market at present is mainly divided into three types of friction locking, mechanical locking and permanent locking.

Friction anti-loose is the most common anti-loose mode, and the anti-loose effect is achieved mainly by increasing friction force of contact surfaces. The technology is realized by adopting a spring gasket, a double nut and the like. However, this loose-proof method requires additional preparation of fittings such as washers and nuts, which increases the cost and complexity of installation. More importantly, under the condition of receiving large impact force or vibration, the anti-loosening mode is easy to loose, so that the connection is invalid.

The mechanical looseness prevention is realized by a plurality of mechanical structures. For example, thrust pins, thrust wires, or the like are used to limit movement of the bolt or nut. Although this anti-loosening manner improves the reliability of the connection to some extent, it also requires additional operations such as installation of thrust pins or thrust wires, etc., which not only affect the assembly efficiency, but also increase the difficulty of installation.

The permanent anti-loose is a more thorough anti-loose mode. It is common to join bolts and nuts firmly by spot welding, riveting, bonding, etc. The anti-loosening mode is not easy to loosen after connection, and has good reliability. However, it also has some problems. For example, additional welding, riveting, gluing, etc. operations are required, which not only increase the production costs, but may also damage the material of the connection. In addition, once the connection needs to be removed or replaced, the permanent anti-loosening manner will cause great inconvenience.

Disclosure of utility model

The embodiment of the utility model provides a locking bolt and a vehicle, which are used for solving the problems that accessories or operation are required to be additionally added in the existing bolt locking technology, the locking effect is unreliable or the assembly efficiency is influenced and the like.

To solve the above problems, a first aspect of an embodiment of the present utility model discloses a lockbolt, including:

The rod body is provided with a placement groove along the length direction of the rod body;

The nut is arranged at one end of the rod body;

the clamping block is assembled in the mounting groove in a sliding manner along the direction perpendicular to the length direction of the rod body;

The elastic piece is arranged inside the placing groove, and two ends of the elastic piece are respectively connected with the clamping block and the inner wall of the placing groove.

Optionally, the mounting groove includes a first portion and a second portion, a width of the first portion is smaller than a width of the second portion, the fixture block includes a first block and a second block, and widths of the first block and the second block correspond to widths of the first portion and the second portion, respectively.

Optionally, the mounting groove further includes a third portion, the third portion is located on a side, away from the first portion, of the second portion, and a width of the third portion is smaller than a width of the second portion, and at least a portion of the elastic member is located inside the third portion.

Optionally, the first block is provided with an inclined surface, and the inclined surface faces away from the nut.

Alternatively, a part of the inclined surface is located inside the seating groove in a relaxed state of the elastic member.

Optionally, the fixture block with the elastic component all is provided with a plurality of, just the fixture block with the elastic component one-to-one, the elastic component with the fixture block an organic whole sets up.

Optionally, the elastic element and the clamping block are made of stainless steel.

Optionally, the body of rod is located the standing groove is close to the holding groove has been seted up to the one end of nut, the holding groove with the standing groove intercommunication, the width of holding groove is greater than the width of the second block of fixture block, just be provided with the dog in the holding groove.

Optionally, the lockbolt further comprises a nut in threaded match with the rod body, and the nut can be screwed from one end of the rod body away from the nut to one end of the rod body where the nut is located.

A second aspect of the present application provides a vehicle including a first connecting member, a second connecting member abutting against the first connecting member, a check bolt and a nut as provided in the first aspect of the present application

The rod body of the lockbolt penetrates through the first connecting piece and the second connecting piece, and the nut of the lockbolt is abutted with the first connecting piece;

The nut is sleeved on the rod body, one side of the nut is abutted with the second connecting piece, and the other side of the nut is abutted with the clamping block of the locking bolt.

The embodiment of the utility model has the following advantages:

1. by arranging the mounting groove on the rod body and providing the slidable clamping block and the elastic piece, the locking mechanism that the clamping block contracts inwards and the nut axially passes through the back clamping block to the original position to block the nut or the bolt from loosening is realized.

2. The clamping blocks and the elastic pieces cooperate to ensure the reliability and stability of the bolt connection, and avoid the problem of connection failure when receiving larger impact force or vibration.

3. Compared with the traditional bolt anti-loosening technology, the utility model does not need to additionally add accessories such as gaskets, nuts and the like, does not need to carry out operations such as welding, riveting, gluing and the like, and reduces the cost and the complexity of installation.

Drawings

In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view showing a partial cross-sectional structure of a lockbolt according to an embodiment of the present application;

FIG. 2 is a schematic diagram showing a partial cross-sectional structure of a lockbolt according to an embodiment of the present application;

FIG. 3 is a cross-sectional view taken at A-A of FIG. 2;

Fig. 4 is a schematic diagram of a block structure of a lockbolt according to an embodiment of the present application;

FIG. 5 is a cross-sectional view of a shank, a latch and an elastic member of a lockbolt according to an embodiment of the present application;

FIG. 6 is a schematic view of a lockbolt according to an embodiment of the present application;

FIG. 7 is a schematic cross-sectional view of a lockbolt according to an embodiment of the present application;

FIG. 8 is a schematic diagram showing a cross-sectional structure of a lockbolt according to an embodiment of the present application;

The reference numerals indicate the rod body 1, the receiving groove 11, the first portion 111, the second portion 112, the third portion 113, the nut 2, the nut 3, the clip 4, the first block 41, the second block 42, the inclined surface 43, the elastic member 5, and the stopper 6.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

As shown in fig. 1, a first aspect of the present application discloses a lockbolt comprising:

the rod body 1 is provided with a placement groove 11 along the length direction of the rod body 1;

The nut 2 is arranged at one end of the rod body 1, and the nut 2 and the rod body 1 are integrally arranged;

At least one clamping block 4, wherein the clamping block 4 is slidingly assembled in the mounting groove 11 along the direction perpendicular to the length direction of the rod body 1;

The elastic piece 5, the elastic piece 5 is located inside the standing groove 11, and the both ends of elastic piece 5 respectively with fixture block 4 with the inner wall of standing groove 11 is connected.

In some embodiments, referring to fig. 6, the lockbolt may further include a nut 3, where the nut 3 is in threaded engagement with the rod 1, and the nut 3 can be screwed from an end of the rod 1 remote from the nut 2 to an end of the rod 1 adjacent to the nut 2.

The rod body 1 is a main bearing part of the lockbolt, and the lockbolt is used for providing the basic structure and strength of the bolt and ensuring that the bolt can bear expected load. The nut 2 is arranged at one end of the rod body 1, and is mainly used for matching the rod body 1 with the nut 3 to complete connection and fastening work. The nut 3 is a key component in the connector, which is screwed with the rod body 1, for tightly connecting two or more components together. The rod body 1, the nut 2 and the nut 3 form the basic connection object function of the bolt.

The mounting groove 11 is formed on the rod body 1 and is arranged along the length direction of the rod body 1, and is mainly used for accommodating the clamping block 4 and the elastic piece 5, and the clamping block 4 and the elastic piece 5 can be arranged at any length position of the rod body 1. Meanwhile, the design enables the clamping block 4 to slide in the groove, namely, the clamping block can be hidden inside the rod body 1 or protrude out of the rod body 1, and necessary support is provided for the anti-loosening function.

When the elastic member 5 is in a loose state, a part of the clamping block 4 is exposed out of the mounting groove 11, when the clamping block 4 is forced to move towards the inside of the mounting groove 11, the elastic member 5 is compressed, so that the elastic member 5 generates elastic force, and when the clamping block 4 is not forced, the clamping block 4 returns to an initial position under the action of the elastic force of the elastic member 5.

In this way, the clamping block 4 is slidably assembled in the mounting groove 11, in the process of screwing the nut 3 on the rod body 1 by using the locking bolt, the nut 3 moves towards the mounting groove 11 when passing through the position of the clamping block 4, and after the nut 3 passes through the position of the clamping block 4, the clamping block 4 is rebounded to the original position under the action of the elastic piece 5, and at the moment, the clamping block 4 protrudes out of the mounting groove 11, so that the nut 3 or the bolt is blocked from moving axially outwards, and the locking effect is achieved.

The elastic piece 5 can be a spring, a rubber body or the like. In the embodiment of the present application, the elastic member 5 is a spring, and one end of the spring contacts the clamping block 4, and the other end of the spring contacts the inner wall of the mounting groove 11.

The clamping block 4 and the elastic piece 5 play a role in locking in the locking bolt together, and through the cooperation and cooperation of the clamping block 4 and the elastic piece, the reliability and the stability of the bolt connection are realized.

As shown in fig. 2 to 3, specifically, the receiving groove 11 includes a first portion 111 and a second portion 112, a width of the first portion 111 (referring to a dimension of the first portion 111 along a first direction perpendicular to a length direction of the rod body 1, and the first direction is perpendicular to a sliding direction of the latch 4, and hereinafter, a width of each component also refers to a dimension of the component along the first direction) is smaller than a width of the second portion 112, and the latch 4 includes a first block 41 and a second block 42, and widths of the first block 41 and the second block 42 correspond to widths of the first portion 111 and the second portion 112, respectively.

The first portion 111 of the placement groove 11 is a portion of the placement groove 11 that is closer to the opening, and the second portion 112 of the placement groove 11 is an inner portion of the placement groove 11. The width of the first portion 111 of the mounting groove 11 is smaller than that of the second portion 112, so that the clamping block 4 cannot be easily separated from the mounting groove 11, and the situation that the clamping block 4 is completely moved out of the mounting groove 11 is avoided, and the using effect of the locking bolt is ensured.

As shown in fig. 4 to 5, the widths of the first block 41 and the second block 42 of the clamping block 4 correspond to the widths of the first portion 111 and the second portion 112 of the mounting groove 11, respectively, and this precise fit relationship ensures stability and firmness of the clamping block 4 in the mounting groove 11, and prevents the clamping block 4 from shaking or falling off when an external force is applied. And the first portion 111 and the second portion 112 of the seating groove 11 form steps, also preventing the cartridge 4 from completely sliding out of the interior of the seating groove 11.

By precisely designing the shapes and the sizes of the clip 4 and the seating groove 11, it is possible to ensure that they maintain stable structural strength when they are subjected to external force, thereby improving the reliability and durability of the entire lockbolt.

Further, referring to fig. 5, the receiving groove 11 further includes a third portion 113, the third portion 113 is located at a side of the second portion 112 away from the first portion 111, and a width of the third portion 113 is smaller than a width of the second portion 112, and at least a portion of the elastic member 5 is located inside the third portion 113.

The third portion 113 provides a specific positioning space for the elastic member 5, so that the elastic member 5 can be stably mounted in the mounting groove 11 without being displaced or failed due to vibration of a bolt or external force. The third portion 113 has a smaller width than the second portion 112, which helps to limit the lateral movement of the elastic member 5, so that it can exert an elastic effect when being subjected to pressure, while ensuring the stability and reliability of the latch 4 during sliding.

The elastic member 5 is disposed inside the third portion 113, and when the elastic member 5 is compressed to the limit, the step between the third portion 113 and the second portion 112 can prevent the latch 4 from being continuously pushed down, thereby preventing the elastic member 5 from being excessively compressed, resulting in damage.

In one embodiment, referring to fig. 4, the first block 41 is provided with an inclined surface 43, and the inclined surface 43 faces away from the nut 2.

The inclined surface 43 faces away from the nut 2, i.e. in the direction of the non-tightened nut 3. The inclined surface 43 of the first block 41 is designed, and the length of the edge of the inclined surface, which is close to the center of the rod body, is smaller than 1/2 of the nominal diameter of the matched nut, and the length of the edge of the inclined surface, which is close to the center of the rod body, is larger than 1/2 of the nominal diameter of the matched nut. So that the inner surface of the nut 3 can gradually and smoothly press the inclined surface 43 during the screwing of the nut 3, thereby causing the clip 4 to be contracted radially inward.

This design reduces the resistance when the nut 3 is tightened and makes the compression process of the cartridge 4 smoother. When the nut 3 axially passes through the clamping block, the inclined surface 43 is designed to enable the clamping block 4 to rebound to the original position more easily under the action of the elastic force of the elastic member 5, so that the back surface of the first block 41 of the clamping block 4, which is far away from the inclined surface 43, can be abutted against the top surface of the nut 3, and thus the nut 3 or the bolt can be effectively blocked from axially moving outwards. Meanwhile, after the nut 3 is screwed down, the clamping block 4 which is positioned at the inner side of the nut 3 is elastically abutted against the internal thread of the nut 3 under the action of the elastic force of the elastic piece 5, and the effect of preventing the nut 3 from moving can be achieved under the condition that the nut 3 is not rotated.

The inclined surface 43 not only improves the compression efficiency of the clamping block 4 in the screwing process of the nut 3, but also enhances the rebound effect and the anti-loosening capability of the clamping block after the nut 3 is loosened.

The design of the inclined surface 43 also has a certain flexibility, which can adapt to nuts 3 of different sizes to a certain extent. Due to the inclined surface 43, the clamping block 4 can generate certain deformation when being extruded by the nut 3, so that the nut 3 with different sizes can be matched more flexibly, namely, the nut 3 can press the clamping block 4 through the inclined surface 43 no matter a little larger or a little smaller, the clamping block 4 is retracted into the placing groove 11, and the effectiveness and the reliability of the lockbolt in various application scenes are ensured.

Further, in the relaxed state of the elastic member 5, a part of the inclined surface 43 is located inside the seating groove 11.

In this way, when the nut 3 is screwed, it is necessarily in contact with the inclined surface 43 when in contact with the clip 4, thereby ensuring that the nut 3 is not jammed. The inclined surface 43 is arranged in such a way that the clamping block 4 slides in the mounting groove 11 more smoothly, the nut 3 with different sizes and different tightening degrees can be adapted, and the applicability and the reliability of the lockbolt are improved.

In one embodiment, referring to fig. 1, a plurality of the clamping blocks 4 and the elastic members 5 are provided, and the clamping blocks 4 and the elastic members 5 are in one-to-one correspondence, and the elastic members 5 are integrally provided with the clamping blocks 4.

The integral arrangement means that the elastic member 5 and the clamping block 4 are integrated into one body during the manufacturing process, thereby reducing errors and loosening possibility during the assembly process and enhancing the structural stability of the whole lockbolt. At the same time, the assembly process is simplified, since the elastic member 5 is not required to be separately installed, the assembly steps and time are reduced, and the assembly efficiency is improved.

The elastic piece 5 and the clamping block 4 which are integrally arranged can work cooperatively better, so that the clamping block 4 can be subjected to uniform elastic force when the nut 3 is screwed down, and therefore the nut 3 is more effectively rebounded to an anti-loosening position after being loosened, and the anti-loosening performance is improved. The elastic member 5 and the clip 4 integrally provided reduce the risk of loosening and damage due to long-term vibration or impact, thereby enhancing the durability of the entire lockbolt.

In one embodiment, when the elastic member 5 is a spring or other metal material, the elastic member 5 and the clamping block 4 are both made of stainless steel.

Stainless steel is a high strength, corrosion resistant alloy material capable of withstanding significant mechanical stresses and environmental corrosion. Therefore, the elastic member 5 and the clip 4 made of stainless steel can ensure stable performance of the lockbolt in a severe working environment.

The stainless steel material has certain elasticity, and can deform and recover after being acted by external force. This is of importance for the elastic member 5, since it needs to be compressed when the nut 3 is tightened and to rebound rapidly to the original position after the nut 3 is loosened, to block the loosening of the nut.

The stainless steel material has excellent wear resistance and fatigue resistance, and can maintain stable performance for a long period of time without being damaged. Therefore, the elastic member 5 and the clamping block 4 made of stainless steel material can prolong the service life of the lockbolt and reduce the frequency of replacement and maintenance.

In one embodiment, the elastic member 5 is an air spring.

The air spring has excellent nonlinear elastic properties, which means that its stiffness is not constant but varies with load. This feature allows the air spring to better accommodate different load conditions, provide a smoother elastic response, and effectively limit amplitude, preventing resonance and shock. The stiffness of the air spring can be easily adjusted by changing the volume of the air chamber or the pressure of the inner cavity. This adjustability provides the designer with greater flexibility to optimize the spring performance for specific application requirements. In contrast, the stiffness of conventional springs is typically fixed, making such adjustments difficult.

The air spring is relatively low in manufacturing cost and easy to maintain and replace. At the same time, they are generally made of environmentally friendly materials, meeting the requirements of sustainable development. In addition, because the air spring can be adjusted and optimized according to actual needs, the energy consumption and the operation cost can be reduced in actual application.

In one embodiment, the rod body 1 is provided with a receiving groove at one end of the receiving groove 11 near the nut 2, the width of the receiving groove is greater than that of the second block 42 of the clamping block 4, and a stop block 6 is disposed in the receiving groove.

In the embodiment of the present application, the receiving groove 11 extends from the end communicating with the receiving groove to the end of the rod body 1 away from the nut 2, and the end of the receiving groove 11 away from the nut 2 is closed, so that the latch 4 cannot be disengaged from the end of the receiving groove 11 away from the nut 2.

When the clamping block 4 and the elastic piece 5 are installed in the installation groove 11, the clamping block 4 and the elastic piece 5 cannot be directly installed due to the special shape design of the installation groove 11, so that the accommodating groove is arranged in the embodiment of the application. Specifically, since the accommodating groove is communicated with the accommodating groove 11, and the width of the accommodating groove is larger than the width of the second block 42 of the clamping block 4, the clamping block 4 and the elastic piece 5 can be installed in the accommodating groove 11 at the position of the accommodating groove when the clamping block 4 and the elastic piece 5 are assembled, so that the clamping block 4 and the elastic piece 5 are more convenient to be assembled.

Meanwhile, the stop block 6 is arranged in the accommodating groove 11, and the stop block 6 is tightly abutted against the clamping block 4, so that the clamping block 4 is prevented from shaking or turning over in the accommodating groove 11, and the functional effect of the clamping block 4 is reduced or fails.

A second aspect of the application provides a vehicle comprising a first connector 7, a second connector 8 and a lockbolt and nut according to the first aspect of the application.

Specifically, referring to fig. 7 and 8, the first connector 7 and the second connector 8 are abutted against each other, and corresponding through holes (not shown in the drawings) are formed in the first connector 7 and the second connector 8, the rod body 1 of the lockbolt can pass through the through holes, the nut 2 of the lockbolt is required to be abutted against the first connector 7, then the nut 3 is screwed from the other end of the rod body 1 and gradually passes through each clamping block 4 on the rod body 1, and finally one side of the nut 3 is abutted against the second connector 8, and at the same time, the side of the nut away from the second connector 8 is abutted against the clamping block 4 on the rod body 1, that is, the nut 3 is limited in the position of the rod body 1 by the clamping block 1. In this way, the nut 3 is prevented from being separated from the rod body 1 by the clamping block 4 on the rod body 1, so that the connection between the first connecting piece 7 and the second connecting piece 8 is firmer.

It will be appreciated that when there are a plurality of clips 4, the nut 3 will push the clip 4 located inside thereof into the receiving groove 11, and the nut 3 will be restrained by the clip 4 closest to itself, as shown in fig. 8.

In practical applications, the first connecting piece 7 may be a part to be assembled on the vehicle, the second connecting piece 8 may be a sheet metal part of the vehicle, and of course, the locking bolt may be used for connection at other positions of the vehicle.

It should be noted that, in the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described as different from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other.

It should also be noted that, in this document, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Moreover, relational terms such as "first" and "second" may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions, or order, and without necessarily being construed as indicating or implying any relative importance. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising one does not exclude the presence of additional like elements in a process, method, article, or terminal device comprising the element.

The foregoing has outlined rather broadly the more detailed description of the application in order that the detailed description of the application that follows may be better understood, and in order that the present contribution to the art may be better appreciated. While various modifications of the embodiments and applications of the application will occur to those skilled in the art, it is not necessary and not intended to be exhaustive of all embodiments, and obvious modifications or variations of the application are within the scope of the application.

Claims (10)

1. A locking bolt, which comprises a bolt body, characterized by comprising the following steps:

The rod body (1), the rod body (1) is provided with a placement groove (11) along the length direction of the rod body (1);

The nut (2) is arranged at one end of the rod body (1);

The clamping block (4) is slidably assembled in the mounting groove (11) along the direction perpendicular to the length direction of the rod body (1);

The elastic piece (5), elastic piece (5) are located inside standing groove (11), just the both ends of elastic piece (5) respectively with fixture block (4) with the inner wall connection of standing groove (11).

2. The lockbolt according to claim 1, wherein the mounting groove (11) comprises a first portion (111) and a second portion (112), the width of the first portion (111) is smaller than the width of the second portion (112), the fixture block (4) comprises a first block (41) and a second block (42), and the widths of the first block (41) and the second block (42) correspond to the widths of the first portion (111) and the second portion (112), respectively.

3. The lockbolt according to claim 2, wherein the mounting groove (11) further comprises a third portion (113), the third portion (113) being located on a side of the second portion (112) remote from the first portion (111), and the third portion (113) having a smaller width than the second portion (112), at least part of the resilient member (5) being located inside the third portion (113).

4. Lockbolt according to claim 2, wherein the first block (41) is provided with an inclined face (43), and the inclined face (43) is oriented away from the nut (2).

5. A lockbolt according to claim 3, wherein a portion of the inclined face (43) is located inside the seating groove (11) in a relaxed state of the resilient member (5).

6. The lockbolt according to claim 1, wherein the clamping block (4) and the elastic piece (5) are provided in plurality, the clamping block (4) and the elastic piece (5) are in one-to-one correspondence, and the elastic piece (5) and the clamping block (4) are integrally arranged.

7. The lockbolt according to claim 6, wherein the elastic member (5) and the clip block (4) are both made of stainless steel.

8. The lockbolt according to claim 2, wherein a receiving groove is formed in the end, close to the screw cap (2), of the rod body (1) located in the receiving groove (11), the receiving groove is communicated with the receiving groove (11), the width of the receiving groove is larger than that of the second block (42) of the clamping block (4), and a stop block (6) is arranged in the receiving groove.

9. Lockbolt according to any of claims 1-8, further comprising a nut (3) threadedly mated with the shank (1), the nut (3) being capable of being screwed from the end of the shank (1) remote from the nut (2) to the end of the shank (1) where the nut (2) is located.

10. A vehicle, characterized by comprising a first connection piece (7), a second connection piece (8) abutting against the first connection piece (7), a lockbolt according to any of claims 1-8 and a nut (3);

The rod body (1) of the lockbolt passes through the first connecting piece (7) and the second connecting piece (8), and the nut (2) of the lockbolt is abutted with the first connecting piece (7);

The nut (3) is sleeved on the rod body, one side of the nut (3) is abutted with the second connecting piece (8), and the other side of the nut is abutted with the clamping block (4) of the locking bolt.