CN215720090U

CN215720090U - Anti-drop bolt nut subassembly

Info

Publication number: CN215720090U
Application number: CN202122005946.5U
Authority: CN
Inventors: 严初铁
Original assignee: Ningbo Ruiya Fastener Manufacturing Co ltd
Current assignee: Ningbo Ruiya Fastener Manufacturing Co ltd
Priority date: 2021-08-24
Filing date: 2021-08-24
Publication date: 2022-02-01
Anticipated expiration: 2031-08-24

Abstract

The utility model discloses an anti-falling bolt-nut assembly, which comprises a first nut, a blocking assembly and a second nut, wherein the first nut, the blocking assembly and the second nut are sequentially connected onto a first bolt from bottom to top; the first nut and the second nut are respectively in threaded connection with the first threaded part and the second threaded part and are respectively connected with the bottom and the upper part of the blocking component, and the blocking component is sleeved on the first threaded part and the second threaded part; when the first nut is screwed on the first thread part and is in a fastening state, the second nut is used for driving the blocking component to slide to the first nut along the axial direction of the first bolt and abut against the first nut. The anti-falling bolt and nut assembly can effectively prevent the bolt from being unscrewed from the nut and falling off.

Description

Anti-drop bolt nut subassembly

Technical Field

The utility model relates to the technical field of fasteners, in particular to an anti-falling bolt and nut assembly.

Background

The bolt is a cylindrical threaded fastener matched with a nut, and a fastener consisting of a head part and a screw (a cylinder with external threads) needs to be matched with the nut and is used for fastening and connecting two parts with through holes.

The outside to current bolt does not have nut protector for the nut on the bolt easily drops, makes bolt and nut can't pair the use, has caused the waste of resource, and when the environmental shock that bolt and nut were located was great simultaneously, the time is a long time, and the nut can slowly be followed the bolt and become flexible, thereby influences the work of the spare part that needs to be fastened, has reduced the fastness of bolt and nut fastening.

Therefore, how to provide an anti-drop bolt and nut assembly, when the use environment generates vibration, the bolt can still be effectively prevented from being unscrewed and dropped from the nut due to the vibration, and further equipment failure is caused, even safety accidents are caused, and technical problems to be solved by technical staff in the field are urgently needed.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: the anti-falling bolt and nut assembly overcomes at least one defect of the prior art and can effectively prevent a bolt from being unscrewed from a nut.

The technical scheme of the utility model is that the anti-falling bolt-nut assembly with the following structure is provided, which comprises a first nut, a blocking assembly and a second nut which are sequentially connected on a first bolt from bottom to top, wherein the first bolt comprises a first thread part and a second thread part which are coaxially arranged on a screw rod of the first bolt, the external diameter size of the first thread part is larger than that of the second thread part, and the thread turning directions of the first thread part and the second thread part are arranged in opposite directions; the first nut and the second nut are respectively in threaded connection with the first threaded part and the second threaded part and are respectively connected with the bottom and the upper part of the blocking component, and the blocking component is simultaneously sleeved on the first threaded part and the second threaded part; when the first nut is screwed on the first thread part and is in a fastening state, the second nut is used for driving the blocking component to slide to the first nut along the axial direction of the first bolt and abut against the first nut.

Specifically, the blocking assembly comprises a first sleeving part and a second sleeving part which are integrally formed, and the first sleeving part and the second sleeving part are sleeved with a first threaded part and a second threaded part of the first bolt respectively.

After adopting the structure, compared with the prior art, the utility model has the following advantages: the screw rod of the first bolt is divided into a first thread part and a second thread part which are different in outer diameter size and thread turning direction, so that the blocking component is sleeved on the first thread part and the second thread part at the same time and is connected with the first nut and the second nut at the same time; when first nut under the influence of external vibrations, when beginning to spin on first bolt screw rod, just can drive and block the subassembly and rotate with the same direction together, and then transmit the revolving force of this direction for the second nut with the help of blockking the subassembly, because the screw of second nut revolves to revolving to opposite with the screw of first nut, at this moment, when first nut revolves out on the screw rod of first bolt, the second nut just can be on the screw rod of first bolt screw in to solve the technical problem of first nut slippage from first bolt screw rod.

As an improvement, the upper part of the second sleeving and connecting part is coaxially connected with a gasket, and the gasket is abutted against the second nut. The gasket is mainly used for increasing the contact area between the upper part of the second sleeving part and the surface of the second nut and preventing the surface of the second nut from being worn out.

As an improvement, a threaded hole is formed in the side wall of the second sleeving part, the threaded hole extends along the radial direction of the second sleeving part, the inner end of the threaded hole is communicated with a sleeving hole of the second sleeving part, and a second bolt in threaded connection with the threaded hole penetrates through the threaded hole; when the first nut, the blocking component and the second nut are connected to the screw rod of the first bolt and are in a fastening state, the second bolt is used for pressing the screw rod of the first bolt. The second bolt with establish and block the screw hole on the portion of piecing together of subassembly second, can make and block that the subassembly is fixed more firm on the axial direction of bolt screw rod, can effectively avoid leading to blockking the subassembly and for first bolt screw rod endwise slip because of the not hard up of second nut, and then lead to first nut to screw out the problem that drops on first bolt.

As an improvement, the bottom of the blocking component is provided with at least one positioning column, and the upper part of the first nut is provided with a positioning hole used for accommodating the positioning column in a matching manner. Preferably, two positioning columns are arranged and are symmetrically arranged relative to the bottom axial section of the blocking assembly. The setting of reference column and locating hole can avoid blockking to produce apart from the clearance when subassembly bottom and first nut upper portion contact, when first nut back-out on first bolt screw rod, can ensure first nut and the synchronous rotation that blocks the subassembly and can be accurate, can effectively solve the two under the condition that can not accurate synchronous revolution, causes the two technical problem that the contact surface is worn out.

As an improvement, the end part of the positioning column and the end part of the screw rod of the second bolt are arranged in an outward convex arc shape. The protruding tip of arc can ensure that the reference column inserts the locating hole more convenient and fast ground, and the second bolt inserts the screw hole more convenient and fast ground.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic view of the overall structure of the present invention.

Figure 2 is a schematic diagram of a first explosive structure of the present invention.

Figure 3 is a schematic diagram of a second explosive structure according to the present invention.

As shown in the figure:

1. a first bolt; 11. a first threaded portion; 12. a second threaded portion; 2. a first nut; 20. positioning holes; 3. a blocking component; 30. a positioning column; 31. a first nesting portion; 32. a second socketing portion; 321. a threaded hole; 322. a second bolt; 33. sleeving a hole; 4. a second nut; 5. and (7) a gasket.

Detailed Description

The utility model is described in further detail below with reference to the figures and specific examples.

As shown in fig. 1 to 3:

the anti-falling bolt and nut assembly comprises a first nut 2, a blocking assembly 3 and a second nut 4 which are sequentially connected onto a first bolt 1 from bottom to top, wherein the first bolt 1 comprises a first thread part 11 and a second thread part 12 which are coaxially arranged on a screw rod of the first bolt, the outer diameter size of the first thread part 11 is larger than that of the second thread part 12, and the thread turning directions of the first thread part 11 and the second thread part 12 are opposite; the first nut 2 and the second nut 4 are respectively in threaded connection with the first threaded part 11 and the second threaded part 12 and are respectively connected with the bottom and the upper part of the blocking component 3, and the blocking component 3 is sleeved on the first threaded part 11 and the second threaded part 12; when the first nut 2 is tightened on the first threaded portion 11 and in a tightened state, the second nut 4 is used to drive the blocking member 3 to slide toward the first nut 2 in the axial direction of the first bolt 1 and to abut against the first nut 2.

Specifically, the blocking member 3 includes a first hitching part 31 and a second hitching part 32 which are integrally formed, and the first hitching part 31 and the second hitching part 32 are respectively hitched with the first threading part 11 and the second threading part 12 of the first bolt 1.

After adopting above-mentioned structure, this embodiment compares with prior art, has following advantage: the screw rod of the first bolt is divided into a first thread part and a second thread part which are different in outer diameter size and thread turning direction, so that the blocking component is sleeved on the first thread part and the second thread part at the same time and is connected with the first nut and the second nut at the same time; when first nut under the influence of external vibrations, when beginning to spin on first bolt screw rod, just can drive and block the subassembly and rotate with the same direction together, and then transmit the revolving force of this direction for the second nut with the help of blockking the subassembly, because the screw of second nut revolves to revolving to opposite with the screw of first nut, at this moment, when first nut revolves out on the screw rod of first bolt, the second nut just can be on the screw rod of first bolt screw in to solve the technical problem of first nut slippage from first bolt screw rod.

Further, a washer 5 is coaxially connected to an upper portion of the second caulking portion 32, and the washer 5 abuts against the second nut 4. The gasket is mainly used for increasing the contact area between the upper part of the second sleeving part and the surface of the second nut and preventing the surface of the second nut from being worn out.

Furthermore, a threaded hole 321 is formed in the side wall of the second sleeving and connecting part 32, the threaded hole 321 extends along the radial direction of the second sleeving and connecting part 32, the inner end of the threaded hole 321 is communicated with the sleeving and connecting hole 33 of the second sleeving and connecting part 32, and a second bolt 322 screwed with the threaded hole 321 penetrates through the threaded hole 321; when the first nut 2, the blocking member 3 and the second nut 4 are all coupled to the screw of the first bolt 1 and in a fastened state, the second bolt 332 serves to press the screw of the first bolt 1. The second bolt with establish and block the screw hole on the portion of piecing together of subassembly second, can make and block that the subassembly is fixed more firm on the axial direction of bolt screw rod, can effectively avoid leading to blockking the subassembly and for first bolt screw rod endwise slip because of the not hard up of second nut, and then lead to first nut to screw out the problem that drops on first bolt.

Furthermore, the bottom of the blocking component 3 is provided with at least one positioning post 30, and the upper portion of the first nut 2 is fittingly provided with a positioning hole 20 for receiving the positioning post 30. Preferably, two positioning columns are arranged and are symmetrically arranged relative to the bottom axial section of the blocking assembly. The setting of reference column and locating hole can avoid blockking to produce apart from the clearance when subassembly bottom and first nut upper portion contact, when first nut back-out on first bolt screw rod, can ensure first nut and the synchronous rotation that blocks the subassembly and can be accurate, can effectively solve the two under the condition that can not accurate synchronous revolution, causes the two technical problem that the contact surface is worn out.

Furthermore, the end of the positioning column 30 and the end of the screw of the second bolt 322 are both disposed in an outward convex arc shape. The protruding tip of arc can ensure that the reference column inserts the locating hole more convenient and fast ground, and the second bolt inserts the screw hole more convenient and fast ground.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims

1. The utility model provides an anti-drop bolt and nut subassembly which characterized in that: the bolt comprises a first nut (2) which is sequentially connected onto a first bolt (1) from bottom to top, a blocking component (3) and a second nut (4), wherein the first bolt (1) comprises a first thread part (11) and a second thread part (12) which are coaxially arranged on a first bolt screw rod, the outer diameter size of the first thread part (11) is larger than that of the second thread part (12), and the thread turning directions of the first thread part (11) and the second thread part (12) are arranged in opposite directions; the first nut (2) and the second nut (4) are respectively in threaded connection with the first threaded part (11) and the second threaded part (12) and are respectively connected with the bottom and the upper part of the blocking component (3), and the blocking component (3) is sleeved on the first threaded part (11) and the second threaded part (12) at the same time; when the first nut (2) is screwed on the first threaded portion (11) and in a fastened state, the second nut (4) is used for driving the blocking component (3) to slide towards the first nut (2) along the axial direction of the first bolt (1) and abut against the first nut (2).

2. A drop preventing bolt and nut assembly according to claim 1, wherein: the blocking component (3) comprises a first sleeving part (31) and a second sleeving part (32) which are integrally formed, and the first sleeving part (31) and the second sleeving part (32) are sleeved with a first threaded part (11) and a second threaded part (12) of the first bolt (1) respectively.

3. A drop preventing bolt and nut assembly according to claim 2, wherein: the upper part of the second sleeving and connecting part (32) is coaxially connected with a gasket (5), and the gasket (5) is abutted to the second nut (4).

4. A drop preventing bolt and nut assembly according to claim 3, wherein: a threaded hole (321) is formed in the side wall of the second sleeving and connecting part (32), the threaded hole (321) extends along the radial direction of the second sleeving and connecting part (32), the inner end of the threaded hole (321) is communicated with a sleeving and connecting hole (33) of the second sleeving and connecting part (32), and a second bolt (322) in threaded connection with the threaded hole (321) penetrates through the threaded hole (321); when the first nut (2), the blocking component (3) and the second nut (4) are connected to the screw rod of the first bolt (1) and are in a fastening state, the second bolt (322) is used for pressing the screw rod of the first bolt (1).

5. The drop-preventing bolt-nut assembly according to claim 4, wherein: the bottom of the blocking component (3) is provided with at least one positioning column (30), and the upper part of the first nut (2) is provided with a positioning hole (20) which is used for accommodating the positioning column (30) in a matching manner.

6. The drop-preventing bolt-nut assembly according to claim 5, wherein: the end parts of the positioning columns (30) and the end parts of the screws of the second bolts (322) are arranged in an outward convex arc shape.