CN207131694U

CN207131694U - A kind of expansion bolt

Info

Publication number: CN207131694U
Application number: CN201721145181.2U
Authority: CN
Inventors: 徐耀武
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-09-07
Filing date: 2017-09-07
Publication date: 2018-03-23
Anticipated expiration: 2027-09-07

Abstract

The utility model discloses a kind of expansion bolt, including being made up of bolt, tube expansion, plain washer, spring pad and nut, the surface of bolt is cased with tube expansion, the end of bolt is disposed with spring pad, plain washer, nut, the front end of the bolt is provided with step, step forms flat by the front end of bolt, the round bar being provided through on step, the both sides of round bar are respectively arranged with can be around the rotor that round bar rotates, the length of two rotors is more than the diameter of tube expansion, and the width of two rotors is less than the diameter of tube expansion.Expansion bolt of the present utility model is provided with rotor in front end, afterbody grip can be increased during rotor is packed up, also increase lifting surface area simultaneously, improve grip of the expansion bolt to wall, solve expansion bolt has loose phenomenon in wall, and it is easy for installation in installation process, one hand can be installed, convenient and safe.

Description

A kind of expansion bolt

Technical field

It the utility model is related to a kind of bolt, more particularly to a kind of expansion bolt.

Background technology

National environmental protection policy and land protection arable land policy were put into effect in recent years, with building trade new material application, were built Build industry and generally use Light Wall, be mainly incubated not only but also Economization on land, such as gas brick, foamed bricks, hollow brick.Use tradition Expansion bolt in meaning has been extremely difficult to firmly require, the use of expansion bolt is all group to install during construction Mode use, such as 2,4,6,10, one group is punched if any 1-3 can not tighten or insecure in an installation, together When because circuit is high and the problems such as horizontal plane, workmen typically will not be from new transposition punching, therefore it is hidden to leave considerable safety Suffer from.

Traditional expansion bolt, it is afterbody expansion, the diameter after expanding can be higher 20-30% than the diameter before expansion, but It in the hole drilled out is not wall firm in structure to be, it is difficult to play a role, construction environment is poor in addition, and operation erect-position is bad, pole Bit bounce is also easy to produce, then aperture becomes big, and expansion bolt the rotation of bolt body, can not receive position, cause expansion bolt when tightening up Fix loosely, the long-term fixture for influenceing to be connected on expansion bolt in the past, more leave certain potential safety hazard.

Utility model content

The purpose of this utility model provides a kind of expansion bolt for this, the expansion bolt solution for defect in the prior art Expansion bolt in the prior art of having determined can not be well fixed on some walls when fixing, and cause expansion bolt in wall On have loose phenomenon.

To achieve the above object, the technical solution adopted in the utility model is：A kind of expansion bolt, including by bolt, swollen Pipe, plain washer, spring pad and nut composition, the surface of bolt are cased with tube expansion, and the end of bolt is disposed with spring pad, plain cushion Circle, nut, the front end of the bolt are provided with step, and step forms flat by the front end of bolt, is provided through on step Round bar, the both sides of round bar are respectively arranged with can be around the rotor that round bar rotates, and the length of two rotors is more than the diameter of tube expansion, two The width of individual rotor is less than the diameter of tube expansion.

Further, the tube expansion and that end of end in contact before the bolt are provided with some open slots, the end tube expansion Thickness is less than the thickness of other end tube expansion.

Further, the open slot well width is less than the thickness of the rotor.

Further, the rotor is arranged to equilateral triangle, and rotor tilts down from midpoint to both sides, inclined plane and water The angle of plane is 15 ° -25 °, and two rotors are oppositely arranged.

Further, the length of the rotor is less than 1/3 length of the tube expansion.

Further, the length of the rotor is more than 3 times of diameters of the tube expansion.

Beneficial effect：Expansion bolt of the present utility model is provided with rotor in front end, can increase during rotor is packed up Afterbody grip, while lifting surface area is also increased, grip of the expansion bolt to wall is improved, solves expansion bolt in wall In there is loose phenomenon, and easy for installation in installation process, one hand can be installed, convenient and safe.

Brief description of the drawings

Fig. 1 is structural representation of the present utility model.

Fig. 2 is the structural representation of the utility model bolt.

Fig. 3 is the structural representation that rotor is packed up in the utility model.

Related elements symbol description

Bolt 1, tube expansion 2, plain washer 3, spring pad 4, nut 5, step 11, round bar 12, rotor 13, open slot 21

Embodiment

As shown in figure 1, a kind of expansion bolt, including be made up of bolt 1, tube expansion 2, plain washer 3, spring pad 4 and nut 5, The surface of bolt 1 is cased with tube expansion 2, and the end of bolt 1 is disposed with spring pad 4, plain washer 3, nut 5, and the front end of bolt 1 is set It is equipped with step 11, step 11 allows the front end of bolt 1 to form flat, the round bar 12 being provided through on step 11, round bar 12 Both sides are respectively arranged with the rotor 13 that can be rotated around round bar 12, and the length of two rotors 13 is more than the diameter of tube expansion 2, two rotors 13 width is less than the diameter of tube expansion 2.

In one embodiment, in order to further increase the compactness between expansion bolt and wall, tube expansion 2 and spiral shell That end of end in contact is provided with some open slots 21 before bolt 1, and the thickness of the end tube expansion 2 is less than the thickness of other end tube expansion 2, opening The well width of groove 21 is less than the thickness of rotor 13, and when firmly rotating nut, rotor is slowly rotating through, when rotating to certain journey When spending, slowly tube expansion wherein close to that end of rotor can be slowly bent outwardly, so allow for tube expansion to contacting on wall, Thus considerably increase grip of the whole expansion bolt to wall.

In one embodiment, rotated in order to facilitate rotor in wall, while facilitate rotor vertical with tube expansion, General rotor 13 is arranged to equilateral triangle, and rotor 13 tilts down from midpoint to both sides, and the angle of inclined plane and horizontal plane is 15 ° -25 °, two rotors 13 are oppositely arranged, and such design method can cause rotor can be vertical with tube expansion in wall, Then quickly cause expansion bolt be closely fixed in wall.

In one embodiment, rotated in order to facilitate rotor, improve grip of the rotor 13 to wall, the length of rotor 13 is small In 1/3 length of tube expansion 2, the length of rotor 13 is more than 3 times of diameters of tube expansion 2.

It is that expansion bolt is sent into the hole on wall in the course of work of expansion bolt of the present utility model, then will rotation Turn the nut on expansion bolt, then the rotor on bolt can be rotated in wall, and then rotor can be rotated slowly, For general nut in the case of locked, rotor can be in plumbness with tube expansion, while during rotor rotation, with opening That end tube expansion of mouth groove slowly can be bent outwardly and extend into cavity, and the motion of the rotor of the above and the motion of tube expansion improve Expansion bolt greatly strengthen the close connection between expansion bolt and wall to the grip of wall.

Expansion bolt of the present utility model is provided with rotor in front end, can increase afterbody grip during rotor is packed up, Lifting surface area is also increased simultaneously, improves grip of the expansion bolt to wall, solve expansion bolt has pine in wall Dynamic phenomenon, and it is easy for installation in installation process, and one hand can be installed, convenient and safe.

Embodiment described above is only that preferred embodiment of the present utility model is described, not to this practicality New spirit and scope are defined.On the premise of the utility model design conception is not departed from, ordinary people in the field couple The all variations and modifications that the technical solution of the utility model is made, the scope of protection of the utility model all should be dropped into.

Claims

1. a kind of expansion bolt, including it is made up of bolt, tube expansion, plain washer, spring pad and nut, the surface of bolt is cased with swollen Pipe, the end of bolt are disposed with spring pad, plain washer, nut, it is characterised in that the front end of the bolt is provided with platform Rank, step form flat by the front end of bolt, the round bar being provided through on step, and the both sides of round bar are respectively arranged with can be around The rotor of round bar rotation, the length of two rotors are more than the diameter of tube expansion, and the width of two rotors is less than the diameter of tube expansion.

2. expansion bolt as claimed in claim 1, it is characterised in that the tube expansion and that end of end in contact before the bolt are set Some open slots are equipped with, the thickness of the end tube expansion is less than the thickness of other end tube expansion.

3. expansion bolt as claimed in claim 2, it is characterised in that the open slot well width is less than the thickness of the rotor Degree.

4. expansion bolt as claimed in claim 1, it is characterised in that the rotor is arranged to equilateral triangle, and rotor is in Point tilts down to both sides, and the angle of inclined plane and horizontal plane is 15 ° -25 °, and two rotors are oppositely arranged.

5. expansion bolt as claimed in claim 1, it is characterised in that the length of the rotor is less than 1/3 length of the tube expansion Degree.

6. expansion bolt as claimed in claim 1, it is characterised in that the length of the rotor is more than 3 times of the tube expansion directly Footpath.