Lock bolt with pre-tightening force

Abstract

The utility model relates to the field of bolts, and discloses a lock bolt with pretightening force, which comprises a nut, a connecting rod is arranged at the bottom end of the nut, a screw is arranged at the bottom end of the connecting rod, a pretightening component is sleeved on the outer side of one end, close to the nut, of the connecting rod, and the top end of the pretightening component is clamped and fixed with the bottom end of the nut. According to the structure, the nut and the pre-tightening assembly can be assembled and disassembled conveniently while the good anti-loosening effect is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to bolt field, concretely is a kind of self-preloaded anti-loose bolt. BACKGROUND

[0002] As is known to all, bolt is a kind of fastener consisting of head and shank (cylinder with external thread), it needs to cooperate with nut or screw hole, used for fastening connection of two parts with through hole, this connection form is called bolt connection, such as nut is spun down from bolt, again can make the two parts separate, so bolt connection belongs to detachable connection, because of its convenient installation and disassembly, it is widely used in various trades.

[0003] The utility model discloses a kind of self-preloaded anti-loose bolt of the utility model (announcement) No. CN221120627U, including screw cap, screw rod and positioning pin, the lower end of screw cap is provided with the gasket integrally connected with screw rod, the circumferential surface of gasket is downwardly bent with the outwardly inclined deformation part, the deformation part is provided with several inverted anti-loose teeth, the front end of anti-loose teeth is provided with pointed end, the root of anti-loose teeth is provided with deformation groove, the bottom surface of gasket is provided with the boss lower than anti-loose teeth, the top surface of gasket is provided with the through positioning hole;Anti-loose teeth top touch in screw cap, positioning pin is circumferentially limited, the circumferential of bolt is completely mechanically limited, the tensile force that anti-loose teeth applies in the radial of screw rod is also larger, realize the multiple limit of the circumferential and radial of bolt, pre-tightening, greatly increase the anti-loose capacity of this bolt, simultaneously, this bolt only has one component, structure is also relatively simple, effectively reduce manufacturing and use cost, and it is convenient for user to install.

[0004] The structure of the above-mentioned utility model increases the anti-loose ability of the bolt by providing anti-loose fins, however, the above-mentioned structure is an integral structure, and after the anti-loose fin structure is damaged, the anti-loose ability of the entire bolt during use will be affected, thereby resulting in the need to replace the entire structure after the anti-loose fin is damaged. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of self-preloaded anti-loose bolt to solve the problems raised in the above background art.

[0006] To achieve the above object, the utility model provides the following technical scheme: a kind of self-preloaded anti-loose bolt, including screw cap, the bottom end of screw cap is provided with connecting rod, and the bottom end of connecting rod is provided with screw rod, the outer side of the end of connecting rod close to screw cap is provided with pre-tightening assembly, and the top end of pre-tightening assembly is fixedly connected with the bottom end of screw cap.

[0007] Preferably, a hexagonal hole is formed in the center of the top end of the screw cap.

[0008] Preferably, the pre-tightening assembly comprises a fixing sleeve sleeved outside the connecting rod, and a plurality of insertion blocks are fixedly connected to the top end of the fixing sleeve.

[0009] Preferably, a rubber sleeve is sleeved outside each of the insertion blocks, and a plurality of limiting holes are formed in the bottom end of the nut and matched with the shapes of the insertion blocks.

[0010] Preferably, an annular mounting groove is formed in the bottom end of the fixing sleeve outside the connecting rod, and an annular rubber block is arranged in the annular mounting groove.

[0011] Preferably, a plurality of anti-loosening metal teeth are fixedly arranged at the bottom end of the fixing sleeve outside the annular mounting groove.

[0012] Compared with the prior art, the pre-tightening assembly has the following beneficial effects:

[0013] The screw rod and the fixing member are threadedly connected, the connecting rod is inserted into the corresponding position of the fixing member, and the connecting rod is fixedly connected to the fixing member. The bottom end of each anti-loosening metal tooth abuts against the top end of the fixing member, the annular rubber block arranged at the bottom end of the fixing sleeve is compressed by the threadedly connected screw rod and fixing member, the connecting rod bottom end screw rod is tightly abutted by the elastic force of the compressed annular rubber block and the extrusion of the anti-loosening metal teeth, and the connecting rod is not easily loosened by external force vibration. The top end of the fixing sleeve is clamped by the limiting holes of the nut through the plurality of insertion blocks, and a rubber sleeve is sleeved outside each of the insertion blocks. The limiting holes matched with the insertion blocks are clamped, the rubber sleeve is extruded in the radial direction when the insertion block sleeved with the rubber sleeve is inserted into the limiting hole, the insertion block is fixedly connected to the limiting hole by the elastic force of the compressed rubber sleeve, and the insertion block is not easily loosened. Therefore, the nut and the pre-tightening assembly are conveniently installed and disassembled. Even if the anti-loosening metal teeth at the bottom end of the fixing sleeve are damaged, the pre-tightening assembly is disassembled, and the nut, the connecting rod and the screw rod are still used. In addition, the fixing sleeve is broken, and a new pre-tightening assembly is conveniently replaced. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 The utility model discloses a structure schematic diagram.

[0015] Fig. 2 It is the utility model A place structure amplification schematic diagram.

[0016] In the drawing: 1, nut;2, connecting rod;3, screw rod;4, pre-tightening assembly;5, fixing member;6, hexagonal hole;7, limiting hole;41, fixing sleeve;42, insertion block;43, rubber sleeve;44, annular mounting groove;45, annular rubber block;46, anti-loosening metal tooth. DETAILED DESCRIPTION

[0017] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0018] Embodiment one

[0019] Please refer to Figs. 1-2 , a self-pre-tightening locking bolt in the drawing, including a nut 1, the bottom end of the nut 1 is provided with a connecting rod 2, and the bottom end of the connecting rod 2 is provided with a screw rod 3, the outer side of the connecting rod 2 near one end of the nut 1 is sleeved with a pre-tightening assembly 4, and the top end of the pre-tightening assembly 4 is clamped and fixed with the bottom end of the nut 1.

[0020] In this embodiment, a hexagonal hole 6 is opened at the top center position of the nut 1, the pre-tightening assembly 4 includes a fixing sleeve 41 sleeved on the outer side of the connecting rod 2, and the top end of the fixing sleeve 41 is fixedly connected with a plurality of plug blocks 42, the outer side of each plug block 42 is respectively sleeved with a rubber sleeve 43, and the bottom end of the nut 1 is provided with a plurality of limiting holes 7 matched with the shape of each plug block 42, the bottom end of the fixing sleeve 41 is provided with an annular mounting groove 44 on the outer side of the connecting rod 2, and an annular rubber block 45 is arranged in the annular mounting groove 44, and a plurality of anti-loosening metal teeth 46 are fixedly installed at the bottom end of the fixing sleeve 41 outside the annular mounting groove 44.

[0021] Further, the threaded connection process of the screw rod 3 and the fixed part 5 is carried out, and the connecting rod 2 is inserted into the corresponding position of the fixed part 5, so that the fixed connection process with the fixed part 5 is realized, wherein the bottom end of each anti-loosening metal tooth piece 46 abuts against the top end of the fixed part 5, and the threaded connection process of the threaded structure of the screw rod 3 and the fixed part 5 makes the annular rubber block 45 arranged at the bottom end of the fixed sleeve 41 be compressed, so that the screw rod 3 at the bottom end of the connecting rod 2 is tightly abutted by the extrusion of the anti-loosening metal tooth piece 46 on the fixed part 5 and the elastic force of the compressed annular rubber block 45, and the connecting rod 2 cannot be easily loosened by external force vibration, and the top end of the fixed sleeve 41 is clamped with the limiting hole 7 of the nut 1 through the plurality of insert blocks 42, and each insert block 42 is further sleeved with a rubber sleeve 43 on the outer side, so that the limiting hole 7 gap-fitted with the insert block 42 is extruded in the radial direction when the insert block 42 sleeved with the rubber sleeve 43 is inserted into the limiting hole 7, so that the insert block 42 can be fixedly connected with the limiting hole 7 by the elastic force of the compressed rubber sleeve 43, and cannot be easily loosened, so that the installation and disassembly of the nut 1 and the pre-tightening assembly 4 are facilitated, and even after the anti-loosening metal tooth piece 46 at the bottom end of the fixed sleeve 41 is damaged, the pre-tightening assembly 4 is disassembled, the use of the nut 1, the connecting rod 2 and the screw rod 3 is not affected, and it is also convenient to replace the new pre-tightening assembly 4 after the fixed sleeve 41 is broken.

[0022] The working principle of the utility model is as follows: the threaded connection process of the screw rod 3 and the fixed part 5 is carried out, and the connecting rod 2 is inserted into the corresponding position of the fixed part 5, so that the fixed connection process with the fixed part 5 is realized, wherein the bottom end of each anti-loosening metal tooth piece 46 abuts against the top end of the fixed part 5, and the threaded connection process of the threaded structure of the screw rod 3 and the fixed part 5 makes the annular rubber block 45 arranged at the bottom end of the fixed sleeve 41 be compressed, so that the screw rod 3 at the bottom end of the connecting rod 2 is tightly abutted by the extrusion of the anti-loosening metal tooth piece 46 on the fixed part 5 and the elastic force of the compressed annular rubber block 45, and the connecting rod 2 cannot be easily loosened by external force vibration, and the top end of the fixed sleeve 41 is clamped with the limiting hole 7 of the nut 1 through the plurality of insert blocks 42, and each insert block 42 is further sleeved with a rubber sleeve 43 on the outer side, so that the limiting hole 7 gap-fitted with the insert block 42 is extruded in the radial direction when the insert block 42 sleeved with the rubber sleeve 43 is inserted into the limiting hole 7, so that the insert block 42 can be fixedly connected with the limiting hole 7 by the elastic force of the compressed rubber sleeve 43, and cannot be easily loosened, so that the installation and disassembly of the nut 1 and the pre-tightening assembly 4 are facilitated, and even after the anti-loosening metal tooth piece 46 at the bottom end of the fixed sleeve 41 is damaged, the pre-tightening assembly 4 is disassembled, the use of the nut 1, the connecting rod 2 and the screw rod 3 is not affected, and it is also convenient to replace the new pre-tightening assembly 4 after the fixed sleeve 41 is broken.

[0023] It is to be noted that, in the present document, relational terms such as first and second and the like can 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. 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 apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0024] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made therein without departing from the spirit and scope of the application as defined by the appended claims and their equivalents.

Claims

1. A self-preloaded anti-loose bolt, comprising a nut (1), characterized in that: the bottom end of the nut (1) is provided with a connecting rod (2), and the bottom end of the connecting rod (2) is provided with a screw rod (3); a pre-tightening assembly (4) is sleeved on the outer side of the connecting rod (2) close to the one end of the nut (1), and the top end of the pre-tightening assembly (4) is clamped and fixed with the bottom end of the nut (1). A hexagonal hole (6) is formed in the top center of the nut (1).

2. The pretensioner-free lock bolt according to claim 1, characterized in that: The pre-tightening assembly (4) comprises a fixing sleeve (41) sleeved on the outer side of the connecting rod (2), and a plurality of plug blocks (42) are fixedly connected to the top end of the fixing sleeve (41).

3. The pretensioner-equipped lock bolt according to claim 2, characterized by: A rubber sleeve (43) is sleeved on the outer side of each plug block (42), and a plurality of limiting holes (7) are formed in the bottom end of the nut (1) and are matched with the shape of each plug block (42).

4. The pretensioner-free lock bolt according to claim 3, characterized in that: An annular mounting groove (44) is formed in the outer side of the connecting rod (2) at the bottom end of the fixing sleeve (41), and an annular rubber block (45) is arranged in the annular mounting groove (44).

5. The pretensioner-equipped locking bolt according to claim 4, wherein: A plurality of anti-loose metal tooth pieces (46) are fixedly installed at the bottom end of the fixing sleeve (41) outside the annular mounting groove (44).

6. The pretensioner-free lock bolt according to claim 5, characterized in that: ​

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