CN210423331U

CN210423331U - Expansion bolt

Info

Publication number: CN210423331U
Application number: CN201921529639.3U
Authority: CN
Inventors: 曾祥诚
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-09-12
Filing date: 2019-09-12
Publication date: 2020-04-28
Anticipated expiration: 2029-09-12

Abstract

The utility model discloses an expansion bolt, including the bolt body, the bolt body includes back end and anterior segment, be equipped with the external screw thread on the outer periphery wall of anterior segment, still include the expansion pipe, the expansion pipe includes expansion section and screw thread section, and the expansion section is located the screw thread section outside, screw thread section and anterior segment threaded connection, and expansion section tip is opened has many cracks that run through expansion section inner wall and expansion section outer wall, rotates the bolt body, and the back end can get into the expansion section to strut the expansion section. The expansion bolt is convenient to disassemble after being installed, strong in anchoring force, capable of improving the repeated utilization rate of the expansion bolt through the bolt, energy-saving and environment-friendly.

Description

Expansion bolt

Technical Field

The utility model relates to a bolt field, concretely relates to expansion bolts.

Background

An expansion bolt is a special threaded connector used for fixing pipeline supports, hangers, brackets or equipment on walls, floors or columns. When the root fixing device is used, holes with corresponding sizes are drilled on the fixing body by using an impact electric drill (hammer), then the bolt and the expansion pipe are arranged in the holes, and the bolt body is screwed to expand the bolt, the expansion pipe, the mounting piece and the fixing body into a whole, so that the purpose of fixing and rooting is achieved.

The expansion bolts commonly used by people in the current market are sleeve type bottom expansion bolts, and are simple in structure, low in manufacturing cost, convenient to install and deeply popular with people. But the defects and the limitations are very obvious, firstly, the traditional expansion bolt is difficult to disassemble after being installed, and the appearance and the safety are seriously influenced when the expansion bolt is abandoned; secondly, the material can not be reused, which is not beneficial to environmental protection and saving; thirdly, the screw rod can outwards gradually extend out when the bolt is installed and fastened, and the anchoring force of the bolt is influenced.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model provides an expansion bolt, this expansion bolt dismantles the convenience after the installation, and anchor power is strong, through using this bolt, can improve expansion bolt's reuse rate, and is energy-concerving and environment-protective.

The utility model provides an expansion bolt, includes the bolt body, the bolt body includes back end and anterior segment, be equipped with the screw thread on the outer periphery wall of anterior segment, still include the expansion pipe, the expansion pipe includes expansion section and screw thread section, and the expansion section is located the screw thread section outside, screw thread section and anterior segment threaded connection, and expansion section tip is opened has many cracks that run through expansion section inner wall and expansion section outer wall, rotates the bolt body, and the back end can get into the expansion section to strut the expansion section.

At present, expansion bolts are used more and more, and expansion bolts can be used for fixed bolster, gallows, bracket and various equipment, and the inventor finds in the life that traditional expansion bolts dismantle inconveniently after the installation, once install deceleration strip, traffic guardrail or bill-board on the road surface in the place, often can leave expansion bolts after equipment is dismantled, and the expansion bolts who leave expose and form iron pile one by one on the road surface, both influenced traffic safety, again pleasing to the eye. If the expansion bolts need to be disassembled, a cutting machine is needed, so that time and labor are wasted, only the part of the bolts exposed on the ground can be cut, the bolts are not completely cut, sharper iron pricks are easily formed, and more serious traffic hazards are brought. The invention provides a bolt body and an expansion pipe, wherein the bolt body is divided into a rear section and a front section, the expansion pipe is divided into an expansion section and a thread section, the expansion section is positioned on the outer side of the thread section, when the expansion bolt is driven into a drill hole, the thread section firstly enters the drill hole, the outer side refers to one side of the drill hole after the expansion bolt is driven into the drill hole, the thread section is in threaded connection with the front section, the end part of the expansion section is provided with a plurality of cracks penetrating through the inner wall of the expansion section and the outer wall of the expansion section, when the bolt is used, the expansion bolt is firstly drilled on a fixed surface, the front section firstly enters the drill hole, then the bolt body is rotated to move towards the inside of the drill hole, the rear section enters the expansion section and props up the expansion section, when the bolt body is disassembled, the bolt body can be taken out by moving outwards, therefore, the bolt, the restoration of the stationary plane of being convenient for, the bolt body can continue to use simultaneously, only needs to change the expansion pipe, and this expansion bolts simple structure, easy and simple to handle, preparation simple process, with low costs, the anchor power is strong, dismantles easily simultaneously, repeatedly usable, and energy-concerving and environment-protective, very big simplification on market expansion bolts's constitution has very strong suitability, the utility model discloses well anterior segment indicates that the bolt body is advanced to go into one section that the stationary plane was drilled, and the back end indicates that one section that gets into behind the bolt body that the stationary plane was drilled.

Preferably, the expansion section is inclined radially outwardly of the bolt body in a direction from the front section towards the rear section, and an inner wall of the expansion section is in contact with an outer wall of the rear section. The outer wall of the rear section is in contact with the inner wall of the expansion section, so that the rear section enters the expansion section and props open the expansion pipe in the inward movement process of the bolt body.

Preferably, the diameter of the rear section is larger than that of the front section, and the rear section and the front section are connected through a transition section. When the diameter of back end was greater than the anterior segment diameter, the in-process of bolt body toward the internal motion of drilling, the changeover portion is advanced to be gone into the expansion section in, realizes progressively strutting the expansion section. The utility model discloses in, the diameter of anterior segment indicates the nominal diameter of anterior segment screw thread, and wherein the external screw thread indicates the big footpath of external screw thread, and the internal thread indicates the pole footpath of anterior segment.

Preferably, the rear section is a polished rod section, the diameter of the rear section is the same as that of the front section, and the inner side wall of the expansion section is also provided with threads. During the use, anterior segment and screw thread section match, in the rotatory drilling that gets into, also be equipped with the screw thread on the expansion segment inside wall, the back end diameter is the same with the anterior segment, but does not set up the screw thread, and rotatory bolt body gets into the in-process of drilling, and the back end can not match rotatory the entering with the expansion segment screw thread, only can strut the expansion pipe, realizes that the back end gets into in the expansion segment and struts the expansion segment.

Preferably, a plurality of the cracks are evenly distributed along the circumferential direction of the expansion pipe. Many cracks are along expansion pipe circumference evenly distributed, divide into a plurality of the same parts with the expansion section, and the expansion section atress is even all around, makes expansion bolt anchoring force stronger.

Preferably, a plurality of circular holes are formed in the outer wall of the expansion pipe along the circumferential direction of the expansion pipe, and the circular holes are communicated with one end of the crack. During the use, the inflation section can receive the outside extension of thrust of back end, probably can make the crack further tear to make the expansion pipe tear, cause expansion bolts to damage, among this technical scheme, it has a plurality of round holes to open on its outer wall along expansion pipe circumference, round hole and crack one end intercommunication, so, can prevent that the crack from tearing.

Preferably, the device further comprises a bolt head, and the bolt head is connected with the free end of the rear section. The bolt head is arranged, so that workers can rotate the bolt body conveniently.

Preferably, the rear section of the bicycle further comprises a flat cushion sleeved on the rear section. The flat pad is sleeved on the rear section, so that the contact area between the bolt head and the fixing surface can be increased, and the anchoring force of the expansion bolt is further increased.

Preferably, still include the bullet pad, the bullet pad cover is established on the back end and the bullet pad is located between flat pad and the bolt head. The elastic pad is sleeved between the flat pad and the rear section of the bolt head, so that the expansion bolt can be prevented from loosening.

Preferably, the expansion pipe further comprises a sleeve, the sleeve is sleeved on the rear section, and the sleeve is located between the flat cushion and the expansion pipe. After the expansion bolt is driven into the drill hole, the bolt head needs to be screwed to enable the bolt body to continue to enter the drill hole, the rotation of the bolt body can generate friction with the inner wall of the drill hole, the drill hole is damaged, the sleeve is additionally arranged, the sleeve plays a supporting role in the drill hole, meanwhile, a gap between the bolt body and the drill hole is plugged, the drill hole is prevented from being damaged, and the stability and the transverse anchoring force of the bolt are increased.

The beneficial effects of the utility model are embodied in: utilize the ingenious cooperation of bolt body and expansion pipe among this technical scheme, during the use, the back end makes the expansion section expand in the inward movement process, make expansion bolt fastening in drilling, during the dismantlement, rotatory bolt body outward movement can, the bolt body can not leave over on the stationary plane, the restoration of the stationary plane of being convenient for, the bolt body can continue to use simultaneously, only need to change the expansion pipe, this expansion bolt simple structure, and is easy and simple to handle, the preparation simple process, and is with low costs, the anchor power is strong, dismantle easily simultaneously, repeatedly usable, energy-concerving and environment-protective, great simplification the constitution of expansion bolt in the market, and the expansion bolt has very strong suitability.

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 embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

FIG. 1 is a front sectional view of the present invention;

fig. 2 is the connecting structure schematic diagram of the middle bolt body and the expansion pipe of the utility model.

In the attached drawings, 1-a bolt body, 2-an expansion pipe, 3-a crack, 4-a flat pad, 5-an elastic pad, 6-a sleeve, 7-a bolt head, 8-a round hole, 11-a front section, 12-a rear section and 22-an expansion section.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.

Example 1

As shown in fig. 1 and fig. 2, including bolt body 1 in this embodiment, bolt body 1 includes back end 12 and anterior segment 11, be equipped with the screw thread on the outer circumferential wall of anterior segment 11, still include expansion pipe 2, expansion pipe 2 includes expansion segment 22 and screw thread section, and expansion segment 22 is located the screw thread section outside, screw thread section and anterior segment 11 threaded connection, and expansion segment 22 tip is opened has many cracks 3 that run through expansion segment 22 inner wall and expansion segment 22 outer wall, rotates bolt body 1, and back end 12 can get into expansion segment 22 to strut expansion segment 22. In this embodiment, the expansion section 22 is inclined radially outward along the bolt body 1 in a direction from the front section 11 to the rear section 12, and an inner wall of the expansion section 22 contacts with an outer wall of the rear section 12, so that the rear section 12 enters the expansion section 22 and expands the expansion section 22.

Example 2

As shown in fig. 1 and fig. 2, including bolt body 1 in this embodiment, bolt body 1 includes back end 12 and anterior segment 11, be equipped with the screw thread on the outer circumferential wall of anterior segment 11, still include expansion pipe 2, expansion pipe 2 includes expansion segment 22 and screw thread section, and expansion segment 22 is located the screw thread section outside, screw thread section and anterior segment 11 threaded connection, and expansion segment 22 tip is opened has many cracks 3 that run through expansion segment 22 inner wall and expansion segment 22 outer wall, rotates bolt body 1, and back end 12 can get into expansion segment 22 to strut expansion segment 22. In this embodiment, the diameter of the rear section 12 is larger than that of the front section 11, and the rear section 12 is connected to the front section 11 through a transition section, so that the rear section 12 enters the expansion section 22 and expands the expansion section 22.

Example 3

As shown in fig. 1 and fig. 2, including bolt body 1 in this embodiment, bolt body 1 includes back end 12 and anterior segment 11, be equipped with the screw thread on the outer circumferential wall of anterior segment 11, still include expansion pipe 2, expansion pipe 2 includes expansion segment 22 and screw thread section, and expansion segment 22 is located the screw thread section outside, screw thread section and anterior segment 11 threaded connection, and expansion segment 22 tip is opened has many cracks 3 that run through expansion segment 22 inner wall and expansion segment 22 outer wall, rotates bolt body 1, and back end 12 can get into expansion segment 22 to strut expansion segment 22. In this embodiment, the rear section 12 is a polished rod section, the diameter of the rear section 12 is the same as that of the front section 11, the inner side wall of the expansion section 22 is also provided with threads, and the threads inside the expansion pipe 2 are full threads.

Example 4

In order to further increase the anchoring force of the expansion bolt, the present embodiment is further defined on the basis of embodiment 1, embodiment 2 or embodiment 3, wherein a plurality of said cracks 3 are evenly distributed along the circumference of the expansion pipe 2. Crack 3 is parallel with 1 axis of bolt body in this embodiment, and crack 3 sets up to four, and four cracks 3 divide into the quartering with expansion section 22 along 2 circumference evenly distributed of expansion pipe, and in order to prevent that crack 3 from tearing, it has a plurality of round holes 8 to open on its outer wall along 2 circumferences of expansion pipe in this embodiment,

round hole

8 and 3 one end intercommunications in crack. In order to facilitate the staff to rotate the bolt body 1, the bolt head 7 is further included in this embodiment, the bolt head 7 is connected with the free end of the rear section 12, the free end of the rear section 12 refers to the other end of the rear section 12 opposite to the connecting end of the front section 11, and the bolt head 7 in this embodiment is a hexagonal head. In order to further increase the anchoring force of the expansion bolt, a flat cushion 4 is further included in the present embodiment, and the flat cushion 4 is sleeved on the rear section 12. The flat pad 4 increases the area of contact of bolt head 7 with the stationary plane, further strengthens expansion bolts's anchor power, in order to prevent that expansion bolts is not hard up, still includes the bullet pad 5 in this embodiment, the bullet pad 5 cover is established on back end 12 and bullet pad 5 is located between flat pad 4 and bolt head 7. In order to prevent the bolt body 1 from causing borehole damage in the process of entering a borehole, the bolt further comprises a sleeve 6 in the embodiment, the sleeve 6 is sleeved on the rear section 12, and the sleeve 6 is located between the flat gasket 4 and the expansion pipe 2. The sleeve 6 supports the borehole and prevents it from collapsing, and in order to further facilitate the installation of the device, the sleeve 6 is connected to the flat pad 4 in this embodiment. The sleeve 6 is made of a metal material in this embodiment.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.

Claims

1. The utility model provides an expansion bolt, includes bolt body (1), its characterized in that, bolt body (1) includes back end (12) and anterior segment (11), be equipped with the screw thread on the outer periphery wall of anterior segment (11), still include expansion pipe (2), expansion pipe (2) are including expansion segment (22) and screw thread section, and expansion segment (22) are located the screw thread section outside, screw thread section and anterior segment (11) threaded connection, and expansion segment (22) tip is opened has many cracks (3) that run through expansion segment (22) inner wall and expansion segment (22) outer wall, rotates bolt body (1), and back end (12) can get into expansion segment (22) to prop open expansion segment (22).

2. An expansion bolt according to claim 1, characterised in that the expansion section (22) is inclined radially outwardly of the bolt body (1) in a direction from the front section (11) towards the rear section (12), and that the inner wall of the expansion section (22) is in contact with the outer wall of the rear section (12).

3. An expansion bolt according to claim 1, characterised in that the diameter of the rear section (12) is greater than the diameter of the front section (11), and that the rear section (12) and the front section (11) are connected by a transition section.

4. An expansion bolt according to claim 1, characterized in that the rear section (12) is a polished rod section, the rear section (12) has the same diameter as the front section (11), and the expansion section (22) is provided with threads on its inner side walls.

5. An expansion bolt according to claim 1, characterized in that a plurality of said cracks (3) are evenly distributed along the circumference of the expansion tube (2).

6. An expansion bolt according to claim 1, characterized in that a plurality of circular holes (8) are opened in the outer wall of the expansion pipe (2) in the circumferential direction thereof, said circular holes (8) communicating with one end of the split (3).

7. An expansion bolt according to claim 1, characterized in that it further comprises a bolt head (7), said bolt head (7) being connected with the free end of the rear section (12).

8. An expansion bolt according to claim 7, characterized in that it further comprises a flat washer (4), said flat washer (4) being fitted over the rear section (12).

9. An expansion bolt according to claim 8, characterized in that it further comprises an elastic washer (5), said elastic washer (5) being placed over the rear section (12) and the elastic washer (5) being located between the flat washer (4) and the bolt head (7).

10. An expansion bolt according to claim 9, characterised in that it further comprises a sleeve (6), said sleeve (6) being placed over the rear section (12), and the sleeve (6) being located between the flat mat (4) and the expansion tube (2).