CN219712014U

CN219712014U - Elastic bolt

Info

Publication number: CN219712014U
Application number: CN202320842819.7U
Authority: CN
Inventors: 刘淦; 肖壮; 陆金琪
Original assignee: Shanghai Apollo Intelligent Equipment Technology Co ltd
Current assignee: Shanghai Apollo Intelligent Equipment Technology Co ltd
Priority date: 2023-04-17
Filing date: 2023-04-17
Publication date: 2023-09-19
Anticipated expiration: 2033-04-17

Abstract

The utility model discloses an elastic bolt, which consists of a bolt head, an elastic body and a screw rod which are coaxially connected in sequence from top to bottom, wherein the joint of the top end of the elastic body and the lower end of the bolt head forms the root of the elastic body, and the root of the elastic body is rounded; an opening angle is formed between the upper end face of the elastic body and the lower end face of the bolt head; the lower end surface of the elastic body is an inclined surface which is inclined upwards from outside to inside, and the angle of the inclined surface is the maximum deformation angle of the elastic body; the thickness of the elastomer is 3-6 mm; the diameter of the root of the elastomer is more than or equal to 1.2 times of the major diameter of the screw thread; the maximum deformation angle of the elastic body is smaller than or equal to the opening angle between the upper end face of the elastic body and the lower end face of the bolt head. The elastic bolt has elastic deformation capability, can play roles in pre-tightening and loosening without installing a spring gasket, reduces the number of parts, can avoid the condition of missing the elastic gasket caused by artificial factors, and improves the running safety and stability of equipment.

Description

Elastic bolt

Technical Field

The present utility model relates to an elastic bolt.

Background

The traditional fastener structure is mainly formed by combining bolts, elastic pads, flat pads and the like, and the elastic pads mainly serve to prevent the bolts from loosening. However, when the equipment is installed or disassembled and reinstalled, the installation of the elastic pad is often omitted and the like due to human factors, so that equipment failure and safety accidents are caused.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art, and provides an elastic bolt which is improved on the basis of the traditional bolt structure, so that an elastic pad is not required to be independently installed, the effects of pre-tightening and loosening and the like can be achieved, the occurrence of potential accidents is reduced, and the safety and stability of equipment operation are improved.

The technical scheme for achieving the purposes is as follows: an elastic bolt comprises a bolt head, an elastic body and a screw rod which are coaxially connected in sequence from top to bottom, wherein:

the connection part of the top end of the elastic body and the lower end of the bolt head forms the root part of the elastic body, and the root part of the elastic body is rounded;

an opening angle is formed between the upper end face of the elastic body and the lower end face of the bolt head;

the lower end surface of the elastic body is an inclined surface which is inclined upwards from outside to inside, and the angle of the inclined surface is the maximum deformation angle of the elastic body;

the thickness of the elastomer is 3-6 mm;

the diameter of the root of the elastomer is more than or equal to 1.2 times of the major diameter of the screw thread;

the maximum deformation angle of the elastic body is smaller than or equal to the opening angle between the upper end face of the elastic body and the lower end face of the bolt head.

The elastic bolt, wherein the maximum deformation angle of the elastic body is 4-8 degrees.

In the elastic bolt, when the opening angle between the upper end face of the elastic body and the lower end face of the bolt head is inconvenient to process, the elastic deformation of the elastic body is realized by increasing the outer diameter of the elastic body.

The elastic bolt has elastic deformation capability, can play roles in pre-tightening and loosening without installing a spring gasket, reduces the number of parts, can avoid the condition of missing the elastic gasket caused by artificial factors, and improves the running safety and stability of equipment.

Drawings

Fig. 1 is a schematic structural view of an elastic bolt of embodiment 1;

fig. 2 is a sectional view of the elastic bolt of embodiment 1;

fig. 3 is a partially enlarged view of the elastic bolt of embodiment 1;

fig. 4 is a schematic structural view of an elastic bolt of embodiment 2;

fig. 5 is a sectional view of the elastic bolt of embodiment 2;

fig. 6 is a partially enlarged view of the elastic bolt of example 2.

Detailed Description

In order to enable those skilled in the art to better understand the technical scheme of the present utility model, the following detailed description is provided with reference to the accompanying drawings:

example 1:

referring to fig. 1, 2 and 3, an elastic bolt according to embodiment 1 of the present utility model comprises a bolt head 1, an elastic body 2 and a screw 3 coaxially connected in this order from top to bottom.

The middle part of the top end of the elastic body 2 is connected with the middle part of the lower end of the bolt head 1, the connection part of the two forms the root part of the elastic body 2, and the root part of the elastic body 2 is rounded off with a round angle Rc; an opening angle a is formed between the upper end face of the elastic body 2 and the lower end face of the bolt head 1; the lower end surface of the elastic body 2 is an inclined surface which is inclined upwards from outside to inside, and the angle of the inclined surface is the maximum deformation angle b of the elastic body.

The maximum pre-tension of the elastomer 2 is determined by the maximum deformation of the elastomer and the stiffness of the elastomer. The stiffness of the elastomer depends on the material of the bolt and the thickness H1 of the elastomer, the diameter Φd1 of the root of the elastomer. Wherein the larger the dimensions of H1, Φd1, the more rigid the elastomer. In general:

the thickness H1 of the elastomer 2 is 3-6 mm;

the diameter phi d1 of the root of the elastomer 2 is more than or equal to 1.2 times of the thread major diameter Md3 of the screw 3, namely, the diameter phi d1 of the root of the elastomer 2 is more than or equal to 1.2 times of the thread major diameter Md3 of the screw 3;

the maximum deformation angle b of the elastomer is about 4-8 degrees;

the maximum deformation angle b of the elastic body is smaller than or equal to the opening angle a between the upper end face of the elastic body and the lower end face of the bolt head, namely, the maximum deformation angle b of the elastic body is smaller than or equal to the opening angle a, when the plasticity of the material of the elastic body is good, the maximum deformation angle b of the elastic body can be properly increased, and the rigidity is increased by a method of increasing the thickness H1 of the elastic body generally.

In order to ensure that the strength of the bolt head is not reduced, the thickness H2 of the bolt head is not lower than the size of a traditional bolt; in order to reduce stress concentration of the bolt head, when the opening angle a is processed, the root of the elastic body is processed into a round angle Rc, and the diameter phi d1 of the root is more than or equal to 1.2 times of the large diameter Md3 of the thread.

Example 2:

referring to fig. 4, 5 and 6, an elastic bolt according to embodiment 2 of the present utility model is different from embodiment 1 in that when the bolt is small in size, the opening angle a and the root diameter Φd1 are inconvenient to process, the outer diameter Φd2 of the elastic body can be increased, the outer diameter Φd2 of the elastic body 2 is larger than the outer diameter of the bolt head 1, and elastic deformation of the elastic body is achieved by increasing the outer diameter Φd2 of the elastic body 2.

The elastic bolt has a simple structure and clear principle, and the elastic deformation capability of the bolt is realized by adopting a method of adding an elastic body on the traditional bolt, so that a spring gasket is not required to be installed. Not only reduces the number of parts, but also avoids the conditions of missing of the spring pad and the like caused by artificial factors. The running safety and stability of the equipment are improved.

In conclusion, the elastic bolt has elastic deformation capability, can play roles in pre-tightening and loosening without installing a spring gasket, reduces the number of parts, can avoid the condition of missing the elastic gasket caused by artificial factors, and improves the running safety and stability of equipment.

It will be appreciated by persons skilled in the art that the above embodiments are provided for illustration only and not for limitation of the utility model, and that variations and modifications of the above described embodiments are intended to fall within the scope of the claims of the utility model as long as they fall within the true spirit of the utility model.

Claims

1. The utility model provides an elastic bolt which characterized in that comprises from top to bottom coaxial coupling's bolt head, elastomer and screw rod in proper order, wherein:

the thickness of the elastomer is 3-6 mm;

2. An elastic bolt according to claim 1, wherein the elastic body has a maximum deformation angle of 4-8 °.

3. An elastic bolt according to claim 1, wherein the elastic deformation of the elastic body is achieved by increasing the outer diameter of the elastic body when the opening angle between the upper end surface of the elastic body and the lower end surface of the bolt head is inconvenient to work.