CN217421781U

CN217421781U - Novel expansion screw

Info

Publication number: CN217421781U
Application number: CN202121449767.4U
Authority: CN
Inventors: 谌越; 徐颀; 郑夷洲
Original assignee: Central Research Institute of Building and Construction Co Ltd MCC Group
Current assignee: Central Research Institute of Building and Construction Co Ltd MCC Group
Priority date: 2021-06-28
Filing date: 2021-06-28
Publication date: 2022-09-13
Anticipated expiration: 2031-06-28

Abstract

The utility model discloses a novel expansion screw relates to expansion screw technical field. This novel inflation screw includes expansion sleeve and wedge, and expansion sleeve prescribes a limit to the axial mating hole, and expansion sleeve has fastening section and cooperation section, and the cross section of fastening section reduces in the direction that deviates from the cooperation section gradually, and a plurality of axial guide slots that distribute along its circumference direction are seted up to the tip of fastening section, and the cooperation section can cooperate with the screw member. The wedge can cooperate in the axial cooperation hole, and the one end of wedge can strut the fastening section and be equipped with a plurality of with axial guide slot complex direction arch, and the other end of wedge is equipped with the threaded connection section. The novel expansion screw has a wide application range, and the pulling resistance and the installation firmness of the novel expansion screw are improved.

Description

Novel expansion screw

Technical Field

The utility model relates to an expansion screw technical field especially relates to a novel expansion screw.

Background

The expansion screw plays an important role in the fields of construction, decoration and the like. Conventional expansion screws are usually made of plastic or metal, and generate friction by pressing the surrounding material; or by changing the shape of the distal end, intruding into the wall provides a pull-out resistance to the member. However, due to the thin wall of the conventional expansion screw, the friction provided is low, and there is a case where the expansion screw may be detached.

Therefore, a new expansion screw is needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a novel inflation screw can have wider application scope, improves its resistance to plucking ability and installation fastness.

For realizing the above technical effect, the technical scheme of the utility model as follows:

a novel expansion screw comprising: the expansion sleeve is provided with a fastening section and a matching section, the cross section of the fastening section is gradually reduced in the direction departing from the matching section, the end part of the fastening section is provided with a plurality of axial guide grooves distributed along the circumferential direction of the fastening section, and the matching section can be matched with a threaded part; the wedge can cooperate in the axial cooperation hole, one end of the wedge can strut the fastening section and be equipped with a plurality of with axial guide slot complex direction arch, the other end of wedge is equipped with the threaded connection section.

Furthermore, the outer peripheral surface of the fastening section is provided with an external fixing thread.

Further, an inner fixing thread is arranged on the inner circumferential surface of the fastening section, and the thread pitch of the outer fixing thread is larger than that of the inner fixing thread.

Further, the inner diameter of the internal fixing thread decreases gradually in a direction away from the mating segment.

Further, the novel expansion screw further comprises a fastener, and the fastener can be connected with the threaded connection section.

Further, the wedge includes a distracting portion having a cross-sectional area that decreases in a direction approaching the threaded connection section.

Further, the minimum cross-sectional area of the spreading portion is smaller than the minimum inner diameter of the fastening section, and the maximum cross-sectional area of the spreading portion is larger than the maximum inner diameter of the fastening section.

Further, the wedge still includes the installation department, the installation department with the portion of strutting is connected, the threaded connection section is established the installation department deviates from the portion of strutting is served, the external diameter of installation department is less than expansion sleeve's internal diameter.

Furthermore, the expansion sleeve also comprises a limiting flange, and the limiting flange is arranged on the end face, deviating from the fastening section, of the matching section.

Further, the number of the axial guide grooves is four.

The utility model has the advantages that: the wedge can cooperate in axial mating hole to make the wedge can strut expansion sleeve's fastening section, make the fastening section can extrude mounting structure, and then make wedge and expansion sleeve all firmly install in mounting structure, the threaded connection section of the wedge other end can be used for installing other articles simultaneously, thereby makes novel inflation screw can play better installation function. When not using the wedge, the user can with the screw member from the cooperation section in the installation and with fastening section struts, also can play the effect of firmly installing screw member and expansion sleeve in mounting structure, from this, the novel expansion screw of this embodiment can be according to the different application methods of actual demand selection, is showing the application scope who has improved novel expansion screw. Meanwhile, as the fastening section is provided with the axial guide groove, and the wedge is provided with the guide bulge matched with the axial guide groove, the guide bulge and the axial guide groove can play a role in guiding the movement of the wedge in the process of opening the fastening section by the wedge, so that the fastening effect between the wedge and the fastening section is better ensured; after the wedge struts the fastening section, when the user installs other articles at the threaded connection section at the other end of the wedge, the relative rotation or relative sliding between the whole wedge and the expansion sleeve under the rotating action of the threaded connection can be prevented, so that the fastening effect between the wedge and the expansion sleeve can be well ensured, and the fastening efficiency at the threaded connection section can be improved.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is a schematic structural view of a novel expansion screw provided in an embodiment of the present invention;

fig. 2 is a schematic view of the internal structure of the expansion sleeve according to the embodiment of the present invention.

Reference numerals

1. An expansion sleeve; 11. a fastening section; 111. an axial guide groove; 112. external fixing threads; 113. internal fixing threads; 12. a mating segment; 13. a limiting flange;

21. a guide projection; 22. a threaded connection section; 23. a distraction section; 24. an installation part;

3. a fastener.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.

It will be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing and simplifying the invention, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The specific structure of the novel expansion screw according to the embodiment of the present invention will be described with reference to fig. 1 and 2.

As shown in fig. 1 and fig. 2, fig. 1 discloses a novel expansion screw, which includes an expansion sleeve 1 and a wedge, the expansion sleeve 1 defines an axial fitting hole, the expansion sleeve 1 has a fastening section 11 and a fitting section 12, the cross section of the fastening section 11 is gradually reduced in the direction departing from the fitting section 12, a plurality of axial guide grooves 111 distributed along the circumferential direction of the fastening section 11 are provided at the end of the fastening section 11, and the fitting section 12 can be fitted with a screw. The wedge can cooperate in axial mating hole, and the one end of wedge can strut fastening section 11 and be equipped with a plurality ofly and axial guide slot 111 complex guide bulge 21, and the other end of wedge is equipped with threaded connection section 22.

It can be understood that the wedge can cooperate in the axial fit hole to make the wedge can strut fastening section 11 of expansion sleeve 1, make fastening section 11 can extrude mounting structure, and then make wedge and expansion sleeve 1 all firmly install in mounting structure, the threaded connection section 22 of the wedge other end can be used for installing other article simultaneously, thereby makes novel inflation screw can play better installation function. When not using the wedge, the user can install the screw thread spare and strut fastening section 11 from cooperation section 12 in, also can play the effect of firmly installing screw thread spare and expansion sleeve 1 in mounting structure, from this, the novel expansion screw of this embodiment can select different application methods according to actual demand, is showing the application scope who has improved novel expansion screw.

Meanwhile, as the fastening section 11 is provided with the axial guide groove 111, and the wedge is provided with the guide protrusion 21 matched with the axial guide groove 111, in the process of expanding the fastening section 11, the guide protrusion 21 and the axial guide groove 111 can play a role in guiding the movement of the wedge, so as to better ensure the fastening effect between the wedge and the fastening section 11; after the wedge struts the fastening section 11, when a user installs other objects on the threaded connection section 22 at the other end of the wedge, the relative rotation or relative sliding between the whole wedge and the expansion sleeve 1 under the rotation effect of the threaded connection can be prevented, so that the fastening effect between the wedge and the expansion sleeve 1 can be well ensured, and the fastening efficiency of the threaded connection section 22 can be improved.

In some embodiments, as shown in fig. 1 and 2, the outer circumferential surface of the fastening section 11 is provided with external fixing threads 112.

It will be appreciated that when the expansion sleeve 1 is mounted in the mounting structure and the fastening section 11 is spread apart by the wedge or the screw member, the external fixing threads 112 of the outer circumferential surface of the fastening section 11 can be engaged with the mounting structure and the pull-out resistance of the expansion sleeve 1 is significantly improved. In addition, when the expansion sleeve 1 needs to be dismantled from the mounting structure, the wedge or the threaded part can be taken out firstly, and the expansion sleeve 1 can be screwed out conveniently through tools such as a wrench, so that the integrity of the mounting structure is well ensured, and the building is attractive, and clear and reliable construction is guaranteed.

In some embodiments, as shown in fig. 2, the inner circumferential surface of the fastening section 11 is provided with an inner fixing thread 113, and the pitch of the outer fixing thread 112 is greater than that of the inner fixing thread 113.

It can be understood that, interior fixed screw thread 113 can be convenient for put into the screw thread spare to fastening section 11 in, and in the screw-in process of screw thread spare, fastening section 11 also can strut under the effect of screw thread spare, and threaded connection between external fixation screw thread 112 and the mounting structure also can be convenient for simultaneously, compares with current ordinary inflation screw, can effectively improve the withdrawal resistance of expansion sleeve 1 at the intermediate course of screw thread spare to guarantee to construct safety betterly. Meanwhile, because the screw thread piece is directly screwed into the expansion sleeve 1, the integrity of the screwed screw thread piece can be well kept, the expansion sleeve 1 can be regarded as a reserved vacancy in the mounting structure, and the expansion sleeve has a very excellent use effect on occasions where large-amplitude oil paintings and other heavy objects need to be hung or replaced.

Meanwhile, as the inner and outer circumferential surfaces of the fastening section 11 are respectively provided with the inner and outer fixing

threads

113 and 112, the thickness of the fastening section 11 is enhanced, the strength of the expansion sleeve 1 is enhanced, and the firmness and reliability of the installation of the expansion sleeve 1 in the installation structure can be improved.

In addition, because the thread pitch of the external fixing thread 112 is larger, the external fixing thread 112 can provide additional resistance provided by the external fixing thread 112 lock while providing a rotary fixing effect, and the connection stability of the expansion sleeve 1 and the mounting structure is further improved.

In some embodiments, as shown in FIG. 2, the inner diameter of the internal fixation thread 113 tapers in a direction away from the mating segment 12.

It can be understood that, because the inner diameter of the internal fixing thread 113 is changed, when the expansion sleeve 1 and the threaded member are used in the novel expansion screw of the embodiment, a plurality of different threaded members can be screwed into the internal fixing thread 113, so that the application range of the novel expansion screw is effectively improved.

In some embodiments, as shown in fig. 1, the novel expansion screw further comprises a fastener 3, the fastener 3 being capable of coupling with the threaded connection section 22.

It can be understood that the fastener 3 can lock the object on the mounting structure through being connected with the threaded connection section 22, and then can cooperate with the mounting structure to play a better limiting effect on the axial displacement of the object, thereby better ensuring the reliability of mounting the object by using the novel expansion screw on the mounting structure.

In some embodiments, as shown in fig. 1, the wedge includes a distracting portion 23, the distracting portion 23 having a cross-sectional area that gradually decreases in a direction approaching the threaded connection section 22.

It can be understood that, through the above-mentioned structural arrangement, when the opening portion 23 moves towards the matching section 12 in the fastening section 11, the opening portion 23 can gradually open the fastening section 11, so that the effect of gradually strengthening the resistance between the fastening section 11 and the mounting structure can be achieved, and the use experience of a user is facilitated.

In some embodiments, as shown in FIG. 1, the minimum cross-sectional area of the distracting portion 23 is less than the minimum inner diameter of the fastening section 11, and the maximum cross-sectional area of the distracting portion 23 is greater than the maximum inner diameter of the fastening section 11.

It can be understood that, with the above-described arrangement, the expansion portion 23 can be ensured to reliably expand the fastening section 11, so that the expansion sleeve 1 can be reliably fixed in the mounting structure.

In some embodiments, as shown in fig. 1, the wedge further comprises a mounting portion 24, the mounting portion 24 is connected with the expanding portion 23, the threaded connection section 22 is arranged at one end of the mounting portion 24 away from the expanding portion 23, and the outer diameter of the mounting portion 24 is smaller than the inner diameter of the expansion sleeve 1.

It can be understood that the installation part 24 can be convenient for install other articles after installing the novel expansion screw on the installation structure, and meanwhile, because the outer diameter of the installation part 24 is smaller than the inner diameter of the expansion sleeve 1, the problem of interference between the installation part 24 and the expansion sleeve 1 can be prevented, so that the normal use of the novel expansion screw is ensured.

In some embodiments, as shown in fig. 1 and 2, the expansion sleeve 1 further comprises a stop flange 13, the stop flange 13 being provided on an end face of the mating section 12 facing away from the fastening section 11.

It can be understood that, the user can carry out dismouting operation with expansion sleeve 1 on mounting structure through operation limit flange 13 to can prevent that expansion sleeve 1 from destroying fastening section 11 and cooperation section 12 at the dismouting in-process, better guarantee the reuse after expansion sleeve 1 dismantles, reduce the average use cost of novel inflation screw.

In some embodiments, the axial guide slots 111 are four.

It can be understood that, the four axial guide grooves 111 can play a better guiding effect and an anti-rotation effect, and also facilitate reducing the processing cost of the expansion sleeve 1, of course, in other embodiments of the present invention, the number of the axial guide grooves 111 can be set to one, two or other numbers, without specific limitation.

Example (b):

the novel expansion screw according to an embodiment of the present invention will be described with reference to fig. 1 and 2.

The novel expansion screw of this embodiment includes expansion sleeve 1, wedge and fastener 3, and expansion sleeve 1 limits the axial mating hole, and expansion sleeve 1 has fastening section 11 and cooperation section 12, and fastening section 11's cross section reduces in the direction that deviates from cooperation section 12 gradually, and a plurality of axial guide slot 111 that distribute along its circumferential direction are seted up to fastening section 11's tip, and cooperation section 12 can cooperate with the screw member. The wedge can cooperate in axial mating hole, and the one end of wedge can strut fastening section 11 and be equipped with a plurality ofly and axial guide slot 111 complex guide bulge 21, and the other end of wedge is equipped with threaded connection section 22.

The outer peripheral surface of the fastening section 11 is provided with an external fixing thread 112. The inner circumferential surface of the fastening section 11 is provided with an inner fixing thread 113, and the pitch of the outer fixing thread 112 is greater than that of the inner fixing thread 113. The internal diameter of the internal fixing thread 113 decreases in the direction away from the mating segment 12. The expansion sleeve 1 further comprises a limiting flange 13, and the limiting flange 13 is arranged on the end face of the matching section 12, which faces away from the fastening section 11.

The wedge includes a distracting portion 23, the cross-sectional area of the distracting portion 23 gradually decreasing in a direction approaching the threaded connection section 22. The minimum cross-sectional area of the expanding portion 23 is smaller than the minimum inner diameter of the fastening section 11, and the maximum cross-sectional area of the expanding portion 23 is larger than the maximum inner diameter of the fastening section 11. The wedge further comprises an installation part 24, the installation part 24 is connected with the expanding part 23, the threaded connection section 22 is arranged at one end of the installation part 24, which is far away from the expanding part 23, and the outer diameter of the installation part 24 is smaller than the inner diameter of the expansion sleeve 1.

The fastener 3 can be connected with the threaded connection section 22.

In the description herein, references to the description of "some embodiments," "other embodiments," or the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims

1. A novel expansion screw, comprising:

the expansion sleeve (1) is provided with an axial matching hole, the expansion sleeve (1) is provided with a fastening section (11) and a matching section (12), the cross section of the fastening section (11) is gradually reduced in the direction departing from the matching section (12), the end part of the fastening section (11) is provided with a plurality of axial guide grooves (111) distributed along the circumferential direction of the fastening section, and the matching section (12) can be matched with a threaded part;

the wedge, the wedge can cooperate in the axial fit hole, the one end of wedge can strut fastening section (11) and be equipped with a plurality of with axial guide slot (111) complex guide bulge (21), the other end of wedge is equipped with threaded connection section (22).

2. The new expansion screw according to claim 1, characterized in that the outer peripheral surface of the fastening section (11) is provided with an external fixation thread (112).

3. The new expansion screw according to claim 2, characterized in that the inner peripheral surface of the fastening section (11) is provided with an inner fixture thread (113), the pitch of the outer fixture thread (112) being greater than the pitch of the inner fixture thread (113).

4. Novel expansion screw according to claim 3, characterized in that the internal diameter of the internal fixation thread (113) decreases gradually in the direction away from the mating section (12).

5. The new expansion screw according to claim 1, characterized in that it further comprises a fastening element (3), said fastening element (3) being connectable with said threaded connection section (22).

6. The new expansion screw according to claim 1, characterized in that said wedge comprises an expansion portion (23), the cross-sectional area of said expansion portion (23) decreasing in the direction approaching said threaded connection section (22).

7. The new expansion screw according to claim 6, characterized in that the minimum cross-sectional area of the distraction portion (23) is smaller than the minimum internal diameter of the fastening section (11), and the maximum cross-sectional area of the distraction portion (23) is larger than the maximum internal diameter of the fastening section (11).

8. The novel expansion screw of claim 6, wherein the wedge further comprises an installation part (24), the installation part (24) is connected with the opening part (23), the threaded connection section (22) is arranged on one end of the installation part (24) deviating from the opening part (23), and the outer diameter of the installation part (24) is smaller than the inner diameter of the expansion sleeve (1).

9. Expansion screw according to claim 1, characterised in that the expansion sleeve (1) further comprises a stop flange (13), the stop flange (13) being provided on the end face of the mating section (12) facing away from the fastening section (11).

10. The new expansion screw according to claim 1, characterized in that said axial guide grooves (111) are four.