CN219865786U

CN219865786U - Expansion screw

Info

Publication number: CN219865786U
Application number: CN202320900044.4U
Authority: CN
Inventors: 赖定荣
Original assignee: Dongguan Xiangshunxin Hardware And Plastic Products Co ltd
Current assignee: Dongguan Xiangshunxin Hardware And Plastic Products Co ltd
Priority date: 2023-04-20
Filing date: 2023-04-20
Publication date: 2023-10-20
Anticipated expiration: 2033-04-20

Abstract

The utility model discloses an expansion screw, which comprises a double-head screw rod, an expansion sleeve and a sleeve expansion piece, wherein the outer surfaces of two ends of the double-head screw rod are respectively provided with a first external thread and a second external thread, the outer surfaces of the double-head screw rod are outwards convexly provided with a rotary column, the sleeve expansion piece is sleeved on the double-head screw rod, the expansion sleeve is sleeved on the double-head screw rod and is positioned between the rotary column and the sleeve expansion piece, one end of the sleeve expansion piece, which is close to the expansion sleeve, is convexly provided with an expansion frustum, the inner wall surface of the expansion sleeve is abutted against the outer surface of the expansion frustum so as to realize rotation stopping of the expansion frustum, and the outer surface of the expansion sleeve is provided with three cracking wire grooves. The utility model adopts the separable double-headed screw and the sleeve expansion piece, so that the double-headed screw can be separated from the sleeve expansion piece only by rotating after the expansion screw is installed, and the double-headed screw can be easily detached for reuse.

Description

Expansion screw

Technical Field

The utility model relates to the technical field of expansion screws, in particular to an expansion screw.

Background

In life and production now, the expansion screw is because its commonality is good, connect firm characteristics by wide application, the screw rod and the expansion piece of current expansion screw are connected into an organic wholely generally, therefore it is usually irremovable after the installation is accomplished, unless demolish the expansion screw destructively, can not take out the expansion screw after expanding tightly, once the misoperation can cause the rejection of this expansion screw, manufacturing cost is higher, and current expansion screw is outwards pulled out with the screw rod through rotatory cover setting screw on the screw rod in order to realize expanding tightly, the length of the screw rod that exposes is different because of the difference of the number of turns of respective screw rotation this moment, easy-to-use and aesthetic property are relatively poor.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art, and provides the expansion screw, which adopts the separable double-ended screw rod and the sleeve expansion piece, so that the double-ended screw bolt can be separated from the sleeve expansion piece only by rotating after the expansion screw is installed, and can be easily detached for reuse.

In order to achieve the above purpose, the utility model provides an expansion screw, which comprises a double-end screw rod, an expansion sleeve and a sleeve expansion piece, wherein the outer surfaces of two ends of the double-end screw rod are respectively provided with a first external thread and a second external thread, a rotating column platform for driving the double-end screw rod to rotate is outwards arranged on the outer surface between the first external thread and the second external thread of the double-end screw rod in an outwards protruding mode, a first threaded hole matched with the first external thread is formed in the sleeve expansion piece, the sleeve expansion piece is sleeved on the double-end screw rod in a threaded mode through the first external thread and the first threaded hole, the sleeve expansion piece can be close to or far away from the rotating column platform along the axial direction of the double-end screw rod when the double-end screw rod rotates, the expansion sleeve is sleeved on the double-end screw rod and is positioned between the rotating column platform and the sleeve expansion piece, an expansion cone platform is convexly arranged at one end of the sleeve expansion sleeve, the diameter of the head end of the expansion cone platform is smaller than the inner diameter of the expansion sleeve, the diameter of the tail end of the expansion cone platform is larger than the inner diameter of the expansion cone platform, the inner wall surface of the expansion cone platform is propped against the inner diameter of the expansion sleeve, the expansion cone platform is arranged on the inner surface of the expansion cone platform, and the expansion sleeve is arranged along the axial direction of the expansion sleeve, and the expansion sleeve is arranged on the expansion cone sleeve expansion sleeve.

As a preferred embodiment, the opening of the other side of one of the three cracking trunking is positioned on the end face of the other end of the expansion sleeve, which is far away from the sleeve expansion piece, and the expansion sleeve is manufactured by integrally punching and bending.

The sealing gasket is sleeved on the double-end screw rod and is positioned between the expansion sleeve and the rotating column table, and two end faces of the sealing gasket are respectively abutted against the end face of the expansion sleeve, which is far away from the other end face of the sleeve expansion piece, and the end face of the rotating column table.

The double-end screw rod is characterized by further comprising a locking nut, wherein the locking nut is provided with a second threaded hole matched with the second external thread, and the locking nut is sleeved on the double-end screw rod in a threaded connection mode of the second external thread and the second threaded hole.

As a preferable implementation mode, the locking nut is provided with anti-slip lines on the end face close to one end of the rotary column platform.

As a preferred embodiment, the rotary pylons are provided as polygonal prisms or irregular prisms.

Compared with the prior art, the utility model has the beneficial effects that:

the utility model has simple structure, reasonable design and stable connection, adopts the separable double-headed screw and the sleeve expansion piece, so that the double-headed screw can be separated from the sleeve expansion piece only by rotation after the expansion screw is installed, and can be easily detached for reuse.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of an expansion screw according to an embodiment of the present utility model;

fig. 2 is an exploded view of an expansion screw according to an embodiment of the present utility model.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1, an expansion screw is provided according to an embodiment of the present utility model, which includes a double-ended screw rod 1, an expansion sleeve 2 and a sleeve expansion member 3, and the respective components of the embodiment are described in detail below with reference to the accompanying drawings.

As shown in fig. 1 and 2, the outer surfaces of the two ends of the double-end screw 1 are respectively provided with a first external thread 11 and a second external thread 12, and a rotating pylon 13 for driving the double-end screw 1 to rotate is arranged on the outer surface between the first external thread 11 and the second external thread 12 of the double-end screw 1 in an outward protruding way, and in specific implementation, the rotating pylon 13 can adopt a polygonal prism, such as a hexagonal prism, according to actual requirements so as to facilitate an operator to install or remove an expansion screw, and also can adopt an irregular prism so that the double-end screw can only be removed by using a special tool, thereby improving the safety.

As shown in fig. 1 and 2, the sleeve expansion part 3 is provided with a first threaded hole 31 matched with the first external thread 11, the sleeve expansion part 3 is sleeved on the double-end screw 1 in a threaded connection manner of the first external thread 11 and the first threaded hole 31, the expansion sleeve 2 is sleeved on the double-end screw 1 and is positioned between the rotary pylon 13 and the sleeve expansion part 3, one end of the sleeve expansion part 3, which is close to the expansion sleeve 2, is convexly provided with an expansion frustum 32, the diameter of the head end of the expansion frustum 32 is smaller than the inner diameter of the expansion sleeve 2, the diameter of the tail end of the expansion frustum 32 is larger than the inner diameter of the expansion sleeve 2, the outer surface of the expansion sleeve 2 is provided with three cracking trunking 21 extending along the axial direction of the expansion sleeve 2, one side opening of each cracking trunking 21 is positioned on one end face of the expansion sleeve 2, each cracking trunking 21 is provided with three open holes 22, preferably, and the outer surface of the expansion frustum 32 is provided with a plurality of rotation stopping protrusions 321 which extend along the axial direction of the expansion screw 1 so as to enhance the effect on the double-end rotation stopping of the expansion frustum 32.

Before installation, make the surface of expansion frustum 32 and the internal face of expansion sleeve 2 tight in the butt, prevent that expansion frustum 32 from rotating together when double-end screw 1 rotates, after seting corresponding through-hole on the working face, with the expansion screw stopper into this through-hole, and make sleeve expansion piece 3 and expansion sleeve 2 all be located this through-hole, then use corresponding instrument and rotate column 13 to be connected and drive double-end screw 1 and rotate, can drive sleeve expansion piece 3 to be close to the direction of rotating column 13 and remove, the surface of expansion frustum 32 and the internal face of expansion sleeve 2 are mutually supported at this moment, make the expansion sleeve 2 be close to the one end of sleeve expansion piece 3 outwards expand, thereby make the surface of expansion sleeve 2 and the internal face of through-hole tight in order to realize the installation of expansion screw, when dismantling, use corresponding instrument and rotate column 13 to be connected and drive double-end screw 1 reverse rotation, until sleeve expansion piece 3 and double-end screw 1 separate this moment, can be light and extract double-end screw 1, and can use once more, the fault-tolerant performance has been reduced, and the manufacturing cost is convenient.

In the concrete implementation, the opening of the other side of one cracking wire groove 21 in the three cracking wire grooves 21 is positioned on the end face of the other end of the expansion sleeve 2, which is far away from the sleeve expansion piece 3, so that the expansion sleeve 2 can be manufactured by integrally punching and bending, and the manufacturing is convenient and the production cost is low.

As shown in fig. 2, the sealing gasket 4 is further included, the sealing gasket 4 is sleeved on the double-end screw 1 and is located between the expansion sleeve 2 and the rotating column table 13, two end faces of the sealing gasket 4 are respectively abutted against the other end face of the expansion sleeve 2, which is far away from the sleeve expansion piece 3, and one end face of the rotating column table 13, and when the sealing gasket 4 is in operation, the opening of the through hole formed in the working face can be blocked, foreign matters can be prevented from entering the through hole, meanwhile, the rotating column table 13 is convenient to rotate, and the use experience is optimized.

In a specific implementation, the second external thread 12 can be connected with corresponding equipment through a threaded connection mode, or the locking nut 5 can be arranged, and the second threaded hole 51 matched with the second external thread 12 is arranged on the locking nut 5, so that the locking nut 5 is sleeved on the double-head screw 1 through the threaded connection mode of the second external thread 12 and the second threaded hole 51, and can be used for installing the corresponding equipment.

Preferably, the end face of the locking nut 5, which is close to the rotary column platform 13, is further provided with a slip-proof line 52, so that the stability of the connection of the locking nut 5 can be improved.

In summary, the utility model has simple structure, reasonable design and stable connection, adopts the separable double-ended screw rod and the sleeve expansion piece, so that the double-ended screw bolt can be separated from the sleeve expansion piece only by rotating after the expansion screw is installed, and can be easily detached for reuse.

The above examples are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present utility model should be made in the equivalent manner, and the embodiments are included in the protection scope of the present utility model.

Claims

1. An expansion screw, characterized in that: including double-end screw rod (1), expansion sleeve (2) and sleeve expansion piece (3), the both ends surface of double-end screw rod (1) is equipped with first external screw thread (11) and second external screw thread (12) respectively, the surface between first external screw thread (11) and the second external screw thread (12) of double-end screw rod (1) outwards is equipped with and is used for driving double-end screw rod (1) pivoted rotation boss (13) outward evagination, be equipped with on sleeve expansion piece (3) with first external screw thread (11) assorted first screw hole (31), sleeve expansion piece (3) are established on double-end screw rod (1) through the mode cover of first external screw thread (11) and first screw hole (31) threaded connection, sleeve expansion piece (3) can be close to or keep away from rotation boss (13) along the axial direction of double-end screw rod (1) when double-end screw rod (1) rotates, expansion sleeve (2) cover is established on double-end screw rod (1) and is located between rotation boss (13) and sleeve expansion piece (3), expansion piece (3) are close to expansion boss (32) expansion end (32), the inner wall surface of expansion sleeve (2) offsets tightly with the surface of expansion frustum (32) in order to realize the end of changeing to expansion frustum (32), three crack wire casing (21) that extend along the axial direction of expansion sleeve (2) are seted up on the surface of expansion sleeve (2), and one side opening of every crack wire casing (21) all is located expansion sleeve (2) and is close to on the terminal surface of sleeve expansion piece (3), has all seted up three expansion hole (22) on every crack wire casing (21), the surface of expansion frustum (32) is equipped with a plurality of along the axial direction of double-end screw rod (1) extension and arranges end bulge (321) in order to strengthen the effect of ending.

2. An expansion screw according to claim 1, wherein: the other side opening of one cracking wire groove (21) in the three cracking wire grooves (21) is positioned on the end face of the other end, far away from the sleeve expansion piece (3), of the expansion sleeve (2), and the expansion sleeve (2) is manufactured by integrally punching and bending.

3. An expansion screw according to claim 1, wherein: still including sealing gasket (4), seal gasket (4) cover is established on double-end screw rod (1) and is located between expansion sleeve (2) and rotation pylon (13), the both ends terminal surface that seals gasket (4) is kept away from the other end terminal surface and the one end terminal surface butt of rotation pylon (13) of sleeve expansion piece (3) with expansion sleeve (2) respectively.

4. An expansion screw according to claim 1, wherein: the novel double-end screw is characterized by further comprising a locking nut (5), wherein a second threaded hole (51) matched with the second external thread (12) is formed in the locking nut (5), and the locking nut (5) is sleeved on the double-end screw (1) in a mode of being in threaded connection with the second threaded hole (51) through the second external thread (12).

5. An expansion screw according to claim 4, wherein: the locking nut (5) is provided with anti-slip lines (52) on the end face of one end close to the rotary column table (13).

6. An expansion screw according to claim 1, wherein: the rotary pylon (13) is configured as a polygonal prism.