CN217713247U

CN217713247U - Expansion pipe capable of expanding in two directions

Info

Publication number: CN217713247U
Application number: CN202221881613.7U
Authority: CN
Inventors: 刘晓辉; 陈黄达; 方宏嘉
Original assignee: Zhejiang Excellent Industries Co ltd
Current assignee: Zhejiang Excellent Industries Co ltd
Priority date: 2022-07-21
Filing date: 2022-07-21
Publication date: 2022-11-01
Anticipated expiration: 2032-07-21

Abstract

The utility model relates to an expansion bolts field specifically discloses an expansion pipe of two-way expansion. The expansion pipe comprises a main body, wherein the main body comprises a front end part and a rear end part, a screw hole is arranged in the main body, and the screw hole is opened at the front end part; the main body comprises an expansion section, a pair of main expansion arms and a pair of auxiliary expansion arms are arranged on the expansion section, the two main expansion arms are oppositely arranged, the two auxiliary expansion arms are oppositely arranged, and the main expansion arms and the auxiliary expansion arms are annularly and alternately distributed around the center line of a screw hole; and the inner walls of the main expansion arm and the auxiliary expansion arm are respectively provided with a convex rib. The main expansion arm and the auxiliary expansion arm of the expansion pipe are expanded in two directions, so that the connection force is distributed more uniformly, and the connection reliability is better.

Description

Expansion pipe capable of expanding in two directions

Technical Field

The utility model relates to an expansion bolts field, concretely relates to expansion pipe of two-way expansion.

Background

An expansion bolt is a threaded connector for connecting devices on the basis of walls, floors, panels and the like. Compared with the conventional bolt, the expansion bolt comprises the expansion pipe, when the expansion bolt is used, the bolt is screwed into the expansion pipe through rotating the bolt, the expansion pipe can be expanded outwards and is expanded with the opening on the foundation, and therefore the expansion bolt has good connection reliability.

The common expansion bolt mainly comprises two forms, wherein the first form is an expansion pipe made of metal materials, when the expansion bolt is used, the matched bolt is extruded into the expansion pipe in a reducing form to force the expansion pipe to be permanently deformed, and the expansion bolt is usually used in occasions such as large-scale equipment installation. The second form is an expansion pipe made of elastic materials, the common expansion pipe is made of plastic materials, self-tapping screws are screwed into the expansion pipe when the expansion pipe is used, the expansion pipe is extruded to expand and deform outwards, and the expansion pipe is commonly used for installation and connection of small and medium-sized articles in work or life. The expansion tube described in the present application is an expansion tube made of an elastic material of the second embodiment.

The applicant previously filed Chinese utility model patent with an authorization notice number of CN 214499693U discloses an anti-extraction expansion bolt, which comprises a rod body, wherein two expansion arms are formed on the rod body through arranging expansion crack grooves, and when the bolt is used, the bolt is screwed in the hole to extrude the two expansion arms to expand outwards. The expansion bolt is only provided with the pair of expansion arms, so that unidirectional outward expansion extrusion expansion is realized, the whole stress of the expansion bolt is not uniform in a connection state, the connection reliability is influenced to a certain extent, and the condition that the basic material is not uniform or the basic hole is defective cannot be well met.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to provide an expansion pipe of two-way expansion, main expansion arm and supplementary expansion arm carry out two-way inflation, and the coupling force distributes more evenly, and the connection reliability is better.

In order to solve the technical problem, the utility model provides a technical scheme as follows: a two-way expanding expansion pipe comprises a main body, wherein the main body comprises a front end part and a rear end part, a screw hole is arranged in the main body, and the screw hole is opened at the front end part;

the main body comprises an expansion section, a pair of main expansion arms and a pair of auxiliary expansion arms are arranged on the expansion section, the two main expansion arms are oppositely arranged, the two auxiliary expansion arms are oppositely arranged, and the main expansion arms and the auxiliary expansion arms are annularly and alternately distributed around the center line of a screw hole; and the inner walls of the main expansion arm and the auxiliary expansion arm are respectively provided with a convex rib.

When the expansion pipe is used, the expansion pipe is inserted into a preset base hole, and a screw is screwed in from the opening section of the screw hole. Along with the screwing of the screw, the main expansion arm and the auxiliary expansion arm expand and deform outwards and are in extrusion contact with the inner wall of the base hole, so that reliable connection is realized.

Compare with common expansion pipe among the background art, main expansion arm and the cooperation of vice expansion arm in this application expansion pipe carry out two-way expansion, and the power of being connected between expansion pipe and the base hole distributes more evenly in week, and the adaptation material that can be better is softer, the material is inhomogeneous, the base hole operating mode such as defect, and the reliability of connecting is better.

Preferably, the expansion section is located at the rear end of the body; the main expansion arm comprises a sealing part corresponding to the rear end part; in a natural state, the sealing parts of the two main expansion arms are matched to partially or completely cover the screw holes.

In the process that the expansion pipe is inserted into the base hole, the sealing part can reduce or prevent impurities in the base hole from entering the expansion pipe, and the subsequent screwing-in operation of the screw is guaranteed to be carried out smoothly.

Preferably, the rear end of the sealing part is provided with a guide slope, and the guide slope can play a role in guiding the expansion pipe in the process of being inserted into the base hole.

Preferably, the length of the secondary expansion arm is less than the length of the primary expansion arm; in a natural state, the sealing part partially or completely covers the end face of the auxiliary expansion arm in the radial direction.

The length of the auxiliary expansion arm is smaller than that of the main expansion arm, and partial fall exists between the main expansion arm and the auxiliary expansion arm in the axial direction in a connection state, so that the connection force between the main expansion arm and the base hole and the connection force between the auxiliary expansion arm and the base hole can be reasonably distributed in the axial direction, the distribution range of the reliable connection force in the axial direction is enlarged, and the connection reliability is further improved.

Preferably, a pre-connecting part is arranged between the two main expansion arms, and the pre-connecting part is arranged close to the rear end part. The pre-connection part can play a good role in protecting the expansion pipe before use, and the deformation and damage of the main expansion arm are prevented.

Preferably, the main body further comprises a withdrawing-preventing section, and a withdrawing-preventing convex part is arranged on the outer side surface of the withdrawing-preventing section.

Preferably, the outer side surface of the anti-retreat segment is also provided with an elastic anti-retreat arm, one end of the elastic anti-retreat arm is fixedly arranged, and the other end of the elastic anti-retreat arm inclines towards the front end part of the body.

The anti-withdrawal subsection can bear the load towards the direction of the front end part in the screwing process of the screw, and effectively prevents the expansion pipe from withdrawing from the base hole in the screwing process of the screw.

Preferably, the main body further comprises an orifice segment corresponding to the front end, and the outer side surface of the orifice segment is provided with a support rib which extends along the axial direction. The support rib can radially support the drill way segmentation, avoids the expansion pipe to rock under the connected state.

Preferably, the ribs of the inner wall of the primary and/or secondary expansion arms extend to the orifice section.

Drawings

FIG. 1 is a schematic structural view of a bidirectionally-expandable inflation tube according to the present embodiment;

FIG. 2 is an elevation view of the present embodiment of the bi-directionally expandable inflation tube;

FIG. 3 is a top view of the expanded tubular of the present embodiment in a bi-directional expansion;

FIG. 4 isbase:Sub>A sectional view taken along line A-A of FIG. 3;

fig. 5 is a sectional view taken along line B-B in fig. 3.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Examples

As shown in fig. 1-3, a two-way expandable tubular comprises a main body, wherein the main body comprises a front end part 4 and a rear end part 5, a screw hole 6 is arranged in the main body, and the screw hole 6 is opened at the front end part 4.

As shown in fig. 1 and fig. 2, the main body includes an expansion section 1, a pair of main expansion arms 11 and a pair of auxiliary expansion arms 12 are provided on the expansion section 1, the two main expansion arms 11 are oppositely disposed, the two auxiliary expansion arms 12 are oppositely disposed, and the main expansion arms 11 and the auxiliary expansion arms 12 are annularly and alternately distributed around the center line of the screw hole 6. And the inner walls of the main expansion arm 11 and the auxiliary expansion arm 12 are respectively provided with a convex rib 13.

When in use, the expansion pipe is inserted into a preset base hole, and a screw is screwed in from the opening section of the screw hole 6. Along with the screwing of the screw, the main expansion arm 11 and the auxiliary expansion arm 12 expand and deform outwards and are in pressing contact with the inner wall of the base hole, and reliable connection is achieved.

Compare with common expansion pipe among the background art, main expansion arm 11 and the cooperation of vice expansion arm 12 in the expansion pipe of this application carry out two-way expansion, and the power of being connected between expansion pipe and the base hole distributes more evenly in week, and adaptation material that can be better is softer, the material is inhomogeneous, the base hole operating mode such as defect, and the reliability of connection is better.

As shown in fig. 2, 4 and 5, in particular, the expansion section 1 is located at the rear end 5 of the body; the main expansion arm 11 comprises a sealing part 112 corresponding to the rear end part 5; in a natural state, the sealing parts 112 of the two main expansion arms 11 are matched to partially or completely cover the screw holes 6. In the process of inserting the expansion pipe into the base hole, the sealing part 112 can reduce or prevent impurities in the base hole from entering the expansion pipe, and the subsequent screwing operation of the screw is ensured to be carried out smoothly.

As shown in fig. 1 and 2, a rear end of the sealing portion 112 is provided with a guiding inclined surface 111, and the guiding inclined surface 111 can play a guiding role in the process of inserting the expansion pipe into the base hole.

As shown in fig. 1 and 2, in particular, the length of the auxiliary expansion arm 12 is smaller than that of the main expansion arm 11. Naturally, the sealing portion 112 partially or entirely covers the end surface of the sub expansion arm 12 in the radial direction. The length of the auxiliary expansion arm 12 is smaller than that of the main expansion arm 11, and in a connection state, partial fall exists between the main expansion arm 11 and the auxiliary expansion arm 12 in the axial direction, so that correspondingly, the connection forces between the main expansion arm 11 and the base hole and between the auxiliary expansion arm 12 and the base hole can be reasonably distributed in the axial direction, the distribution range of the reliable connection force in the axial direction is enlarged, and the connection reliability is further improved.

As shown in fig. 4, in particular, a pre-connecting portion 14 is arranged between the two main expansion arms 11, and the pre-connecting portion 14 is arranged near the rear end portion 5. The pre-joint 14 may provide good protection before the expansion pipe is used, preventing the main expansion arms 11 from deforming and damaging.

As shown in fig. 1 and 2, further, the main body further comprises a withdrawal prevention section 2, and a withdrawal prevention protrusion 22 is arranged on the outer side surface of the withdrawal prevention section 2. The lateral surface of the anti-moving section 2 is also provided with an elastic anti-moving arm 21, one end of the elastic anti-moving arm 21 is fixedly arranged, and the other end inclines towards the front end part 4 of the body. The anti-withdrawal segment 2 can bear the load towards the front end part 4 in the screwing process of the screw, and effectively prevents the expansion pipe from withdrawing from the base hole in the screwing process of the screw.

As shown in fig. 1 and 2, further, the main body further comprises an orifice section 3 corresponding to the front end portion 4, the outer side surface of the orifice section 3 is provided with a support rib 31, and the support rib 31 extends along the axial direction. Support rib 31 can radially support orifice subsection 3, avoids expansion pipe to rock under the connected state. The ribs 13 of the inner wall of the primary expansion arm 11 and/or the secondary expansion arm 12 extend to the orifice section 3.

In summary, the above description is only a preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A two-way expanding expansion pipe comprises a main body, wherein the main body comprises a front end part and a rear end part, a screw hole is arranged in the main body, and the screw hole is opened at the front end part;

the method is characterized in that: the main body comprises an expansion section, a pair of main expansion arms and a pair of auxiliary expansion arms are arranged on the expansion section, the two main expansion arms are oppositely arranged, the two auxiliary expansion arms are oppositely arranged, and the main expansion arms and the auxiliary expansion arms are annularly and alternately distributed around the center line of a screw hole; and the inner walls of the main expansion arm and the auxiliary expansion arm are respectively provided with a convex rib.

2. The expansion tube of claim 1, wherein: the expansion section is positioned at the rear end part of the main body; the main expansion arm comprises a sealing part corresponding to the rear end part; in a natural state, the sealing parts of the two main expansion arms are matched to partially or completely cover the screw holes.

3. The expansion pipe of claim 2, wherein: the rear end of the sealing part is provided with a guide inclined plane.

4. The expansion tube of claim 2, wherein: the length of the auxiliary expansion arm is smaller than that of the main expansion arm; in a natural state, the sealing part partially or completely covers the end face of the auxiliary expansion arm in the radial direction.

5. The expansion tube of claim 2, wherein: and a pre-connecting part is arranged between the two main expansion arms and is close to the rear end part.

6. Expansion tube according to any one of claims 1-5, wherein: the main part still including preventing moving back the segmentation, prevent moving back the segmentation lateral surface and be equipped with and prevent moving back the bellying.

7. The expansion tube of claim 6, wherein: the lateral surface of the anti-moving section is also provided with an elastic anti-moving arm, one end of the elastic anti-moving arm is fixedly arranged, and the other end of the elastic anti-moving arm inclines towards the front end of the body.

8. Expansion tube according to any one of claims 1-5, 7, wherein: the main body also comprises an orifice segment corresponding to the front end part, and the outer side surface of the orifice segment is provided with a support rib.

9. The expansion tube of claim 8, wherein: and the convex ribs on the inner wall of the main expansion arm and/or the auxiliary expansion arm extend to the orifice section.