CN217234038U

CN217234038U - Reusable expansion screw

Info

Publication number: CN217234038U
Application number: CN202220800464.0U
Authority: CN
Inventors: 高敏; 秦春花; 李海军; 李斌寿; 解占孝; 东文赟; 马晓平; 曹兆江; 王明珍; 王雯; 巨克伟; 杨春梅; 刘永霞; 李积虎; 陈长君
Original assignee: Qinghai Lithium Industry Co ltd
Current assignee: Qinghai Lithium Industry Co ltd
Priority date: 2022-04-08
Filing date: 2022-04-08
Publication date: 2022-08-19
Anticipated expiration: 2032-04-08

Abstract

The utility model belongs to the technical field of the mounting technique and specifically relates to a repeatedly usable's inflation screw is related to, it includes the screw rod, nut and sleeve, the sleeve cup joints on the screw rod, the nut cup joint in screw rod one end and with screw rod threaded connection, a plurality of waist type holes have been seted up along sleeve length direction in the sleeve both ends, a plurality of waist type holes are along sleeve circumference evenly distributed, the downthehole expanding mechanism that is provided with of waist type, expanding mechanism includes butt piece and movable rod, butt piece size and shape and waist type hole adaptation, the waist type is arranged in to the butt piece, movable rod one end is articulated with the butt piece, the other end is articulated with the screw rod, the contained angle that movable rod and screw rod formed when the waist type was arranged in to the butt piece is less than 90. This application has the effect that makes expansion screw repeatedly usable, resources are saved.

Description

Reusable expansion screw

Technical Field

The application relates to the technical field of fixing pieces, in particular to a reusable expansion screw.

Background

The expansion screw is a special threaded connecting piece for fixing pipeline supports/hangers/brackets or equipment on walls, floors and columns. The existing expansion screw consists of a screw rod, an expansion pipe and other components, wherein the tail part of the screw rod is in a conical shape, the inner diameter of a cone is larger than that of the expansion pipe, when a nut is screwed down, the screw rod moves outwards, the cone part moves through the axial movement of threads, so that a large positive pressure is formed on the outer peripheral surface of the expansion pipe, and the angle of the cone is small, so that friction self-locking is formed among a wall body, the expansion pipe and the cone, and the fixing effect is achieved.

However, after the existing expansion screw is used for the first time, the expansion pipe is unfolded and is not easy to take out from the drilled hole, even if the expansion pipe is forcibly taken out, the expansion pipe cannot return to the original state after being closed by a tool, the fastening force is reduced, the expansion pipe cannot be reused, the resource waste is caused, and the cost is increased.

SUMMERY OF THE UTILITY MODEL

In order to make the expansion screw repeatedly usable, resources are saved, this application provides a repeatedly usable's expansion screw.

The application provides a repeatedly usable's inflation screw adopts following technical scheme:

the utility model provides a repeatedly usable's inflation screw, includes screw rod, nut and sleeve, the sleeve cup joints on the screw rod, the nut cup joint in screw rod one end and with screw rod threaded connection, a plurality of waist type holes have been seted up along sleeve length direction at the sleeve both ends, and is a plurality of waist type hole is along sleeve circumference evenly distributed, the downthehole expanding mechanism that is provided with of waist type, expanding mechanism includes butt piece and movable rod, butt piece size and shape and waist type hole adaptation, the butt piece is arranged in waist type downthehole, movable rod one end is articulated with the butt piece, and the other end is articulated with the screw rod, the contained angle that movable rod and screw rod formed when waist type hole was arranged in to the butt piece is less than 90.

By adopting the technical scheme, the screw rod is sleeved with the sleeve, a plurality of waist-shaped holes are uniformly formed in the sleeve along the circumferential direction of the sleeve, the plurality of waist-shaped holes are internally provided with the abutting block and the movable rod, one end of the movable rod is hinged with the screw rod, the other end of the movable rod is hinged with the abutting block, when the support is not used, the butt block is jointed with the sleeve in the waist-shaped hole, one end of the screw rod is sleeved with the nut, the end of the screw rod is far away from the sleeve, an included angle formed by the movable rod and the screw rod is less than 90 degrees, the whole expansion screw is put into a drilled hole, one end of the screw rod, which is sleeved with the nut, faces the outside of the drilled hole, the screw rod moves into the drilled hole by rotating the screw rod inwards, because the length of movable rod is unchangeable to the contained angle grow that makes movable rod and screw rod, the butt piece is pushed from waist type hole and is crowded to the drilling perisporium, realizes by the butt piece along sleeve circumference evenly distributed simultaneously to the extrusion of drilling perisporium, and then realizes that the inflation screw is firmly installed in the drilling. When the screw rod is rotated outwards to the drilling, the screw rod moves outwards to the drilling, and under the tensile force effect of screw rod, the contained angle of movable rod and screw rod diminishes, and the butt piece gets back to the waist type downthehole with the sleeve parallel and level again to conveniently take out the inflation screw from the drilling, realize the repeatedly usable of inflation screw, improved the availability factor, practiced thrift the resource.

Optionally, a blocking piece is fixedly arranged at one end, close to the nut, of the sleeve along the circumferential direction of the sleeve, and the blocking piece is axially perpendicular to the sleeve.

By adopting the technical scheme, the blocking piece is fixedly arranged at one end, close to the nut, of the sleeve along the circumferential direction of the sleeve, and the diameter of the blocking piece is larger than that of the sleeve, so that when the sleeve penetrates into a drilled hole, the blocking piece is abutted against the edge of the drilled hole and cannot enter the drilled hole; when screwing in the screw rod to drilling depths, the separation blade is pulling and is holding the sleeve, makes the sleeve be in the drilling outer end all the time to realize telescopic rigidity, when further realizing the screw rod and screwing in to the drilling, the butt joint piece is released and is extrudeed with the drilling perisporium from waist type hole.

Optionally, one end of the screw, which is far away from the nut, is fixedly provided with a protrusion along the circumferential direction of the screw, and the diameter of the protrusion is larger than the inner diameter of the sleeve.

Through adopting above-mentioned technical scheme, keep away from nut one end at the screw rod and follow the fixed protrusion that is provided with of screw rod circumference, under the condition that does not use the inflation screw usually, protrusion and nut are located the sleeve both ends respectively, and this makes the sleeve be difficult for making a round trip to slide on the screw rod, realizes that the butt joint piece is downthehole at the waist type all the time, can not drop from the waist type hole, and enters into in the sleeve to the contained angle that movable rod and screw rod formed is less than 90 all the time.

Optionally, one end of the protrusion, which is far away from the sleeve, is provided with a tip part, and the tip part is fixedly connected with the protrusion.

Through adopting above-mentioned technical scheme, because the structural feature of the drill bit of using during drilling, the drilling deepest that drills out sets up most advanced position for the coniform, keeps away from sleeve one end at the protrusion, and most advanced position and the drilling deepest adaptation of coniform to make most advanced position and the laminating of drilling deepest, reduce the void fraction, make the installation of inflation screw more stable.

Optionally, one surface of the abutting block, which faces away from the movable rod, is provided with a pointed cone protruding from the edge part to the middle part.

Through adopting above-mentioned technical scheme, set the butt piece activity bar one side into the pointed cone dorsad, precession in to the drilling as the screw rod, the angle grow of activity bar and screw rod, when the butt piece is released outside inflation from waist type hole, pointed cone and drilling inner wall butt bore the drilling inner wall even, for the face contact, the pressure that the point contact received is bigger to realize the inseparable laminating of butt piece and drilling inner wall, increase the fastening of inflation screw in the drilling.

Optionally, a first hinge lug is fixedly arranged on one surface, facing the movable rod, of the abutting block, a first hinge block is fixedly arranged at one end of the movable rod, and the first hinge block is hinged to the first hinge lug; the fixed second that is provided with articulated ear on the screw rod, the movable rod other end is fixed and is provided with the articulated piece of second, the articulated piece of second is articulated with the articulated ear of second.

Through adopting above-mentioned technical scheme, the first articulated piece of fixed connection and the articulated piece of second are distinguished at the movable rod both ends, and first articulated piece is articulated with first articulated ear, and the articulated piece of second is articulated with the articulated ear of second, and this kind of articulated mode is not only firm reliable, makes the movable rod only according to a direction back and forth rotation moreover, realizes the accurate waist type hole that comiects of butt piece.

Optionally, the aperture of the waist-shaped hole far away from the screw is larger than the aperture of the waist-shaped hole close to the screw.

Through adopting above-mentioned technical scheme, the aperture that the screw rod position was kept away from in waist type hole is greater than the aperture that is close to the screw rod position, even waist type hole forms a guiding hole, when through to the outer rotatory screw rod of drilling, the butt piece is under the pulling of movable rod, again under the guide effect in waist type hole, enters into waist type hole smoothly, can not too rapidly because of the operation, the phenomenon that the butt piece card can't get into waist type hole in the waist type hole edge or in short.

Optionally, the screw rod is sleeved with two nuts, a thickened flat pad is arranged between the two nuts, and the thickened flat pad is sleeved on the screw rod and is in threaded connection with the screw rod.

Through adopting above-mentioned technical scheme, cup joint two nuts on the screw rod, cup joint the flat pad of thickening between two nuts, make the screw rod increase with the contact surface of nut to increased the stability of screw rod, made the screw rod be difficult for the left and right rocking pendulum when rotating, also strengthened the fastness of inflation screw in drilling.

In summary, the present application includes at least one of the following beneficial technical effects:

1. make the screw rod remove in to drilling through rotatory screw rod, because the length of movable rod is unchangeable to the contained angle grow that makes movable rod and screw rod, the butt piece is pushed from waist type downthehole and extrudees to the drilling perisporium, realizes extruding to the drilling perisporium simultaneously by the butt piece along sleeve circumference evenly distributed, and then realizes that the inflation screw is firmly installed in the drilling. When the screw rod is rotated outwards to the drilling, the screw rod moves outwards to the drilling, and under the tensile force effect of screw rod, the contained angle of movable rod and screw rod diminishes, and the butt piece gets back to the waist type downthehole with the sleeve parallel and level again to conveniently take out the inflation screw from the drilling, realize the repeatedly usable of inflation screw, improved the availability factor, practiced thrift the resource.

2. The blocking piece is fixedly arranged at one end, close to the nut, of the sleeve along the circumferential direction of the sleeve, and when the sleeve penetrates into the drilled hole, the blocking piece is abutted to the edge of the drilled hole and cannot enter the drilled hole; when screwing in the screw rod to the drilling depths, the separation blade pulls and holds the sleeve, makes the sleeve all the time in the drilling outer end to realize telescopic rigidity.

3. Set to the pointed cone one side through with the butt piece activity pole dorsad, when the butt piece is pushed out outside inflation from waist type hole, pointed cone and drilling inner wall butt bore the drilling inner wall even, for the face contact, the pressure that the point contact received is bigger to realize the inseparable laminating of butt piece and drilling inner wall, increase the fastening of inflation screw in the drilling.

Drawings

Fig. 1 is a schematic view of a reusable expansion screw.

Fig. 2 is a partial cross-sectional view of a reusable expansion screw.

Fig. 3 is an enlarged schematic view of a portion a in fig. 2.

Description of the reference numerals: 1. a screw; 11. a protrusion; 12. a tip portion; 13. a second hinge ear; 14. an external thread; 2. a nut; 3. a sleeve; 31. a kidney-shaped hole; 32. a baffle plate; 4. an expansion mechanism; 41. a butting block; 411. a pointed cone; 412. a first hinge ear; 42. a movable rod; 421. a first hinge block; 422. a second hinge block; 5. thickening the flat pad; 6. a first pin rod; 7. a second pin.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses a reusable expansion screw. Referring to fig. 1 and 2, a repeatedly usable's inflation screw includes screw rod 1, nut 2 and sleeve 3, sleeve 3 cup joints on screw rod 1, external screw thread 14 has been seted up to screw rod 1 one end, nut 2 cup joints in screw rod 1 the one end that has external screw thread 14 and with screw rod 1 threaded connection, for reinforcing

screw rod

1 and 2 threaded connection's of nut stability, the cover is equipped with two nuts 2 on screw rod 1, be provided with the flat pad of thickening 5 between two nuts 2, the flat pad of thickening 5 cup joints on screw rod 1 and with screw rod 1 threaded connection.

A plurality of waist type holes 31 have been seted up along 3 length direction of sleeve in 3 both ends of sleeve, and 3 circumference evenly distributed are followed to a plurality of waist type holes 31, in this application, have seted up three waist type hole 31 on 3 every circumference positions of sleeve, and three waist type hole 31 evenly distributed is in 3 weeks of sleeve. An expansion mechanism 4 is arranged in the waist-shaped hole 31, the expansion mechanism 4 comprises a butting block 41 and a movable rod 42, the size, the shape and the thickness of the butting block 41 are matched with those of the waist-shaped hole 31, and the butting block 41 is flush with the outer wall of the sleeve 3 when being arranged in the waist-shaped hole 31; one end of the movable rod 42 is hinged with the abutting block 41, the other end of the movable rod is hinged with the screw rod 1, when the abutting block 41 is arranged in the kidney-shaped hole 31, the screw rod 1 extends out in the direction away from the sleeve 3, and the included angle formed by the movable rod 42 and the screw rod 1 is smaller than 90 degrees.

One end of the sleeve 3, which is close to the nut 2, is provided with a circular-ring-shaped baffle 32 along the circumferential direction of the sleeve 3, the inner ring of the baffle 32 is integrally formed with one end of the sleeve 3, the baffle 32 is axially vertical to the sleeve 3, or the connecting part of the baffle 32 and the sleeve 3 has a taper.

One end of the screw rod 1, which is far away from the nut 2, is provided with a protrusion 11 along the circumferential direction of the screw rod 1, the protrusion 11 is smooth and cylindrical, and the diameter of the protrusion 11 is equal to the outer diameter of the sleeve 3 and is larger than the inner diameter of the sleeve 3, so that the protrusion 11 is not easy to penetrate into the sleeve 3.

The end of the protrusion 11 away from the sleeve 3 is provided with a tip portion 12, the tip portion 12 is an extension end of the screw rod 1, and the tip portion 12 and the protrusion 11 are integrally formed.

The surface of the abutting block 41 back to the movable rod 42 is provided with a pointed cone 411 protruding from the edge to the middle, and the pointed cone 411 and the abutting block 41 are integrally formed and are matched with the abutting block 41 in the bending radian close to the surface of the abutting block 41.

Referring to fig. 3, a first hinge lug 412 is fixedly arranged on one surface of the abutting block 41 facing the movable rod 42, a first hinge block 421 is fixedly arranged at one end of the movable rod 42, and the first hinge block 421 is arranged on the first hinge lug 412 and is hinged through a first pin rod 6; a second hinge lug 13 is fixedly arranged on the screw rod 1, a second hinge block 422 is fixedly arranged at the other end of the movable rod 42, and the second hinge block 422 is arranged on the second hinge lug 13 and is hinged through a second pin rod 7.

The waist-shaped hole 31 is also a guide hole, the hole wall from the position of the waist-shaped hole 31 far away from the screw rod 1 to the position close to the screw rod 1 is an inclined plane, namely the hole diameter of the waist-shaped hole 31 far away from the screw rod 1 is larger than that of the waist-shaped hole close to the screw rod 1, and the abutting block 41 abutted against the hole wall can be guided to rapidly enter the waist-shaped hole 31.

The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a repeatedly usable's inflation screw, includes screw rod (1), nut (2) and sleeve (3), sleeve (3) cup joint on screw rod (1), nut (2) cup joint in screw rod (1) one end and with screw rod (1) threaded connection, its characterized in that: sleeve (3) both ends have been seted up along sleeve (3) length direction a plurality of waist type hole (31), and are a plurality of sleeve (3) circumference evenly distributed is followed to waist type hole (31), be provided with expansion gear (4) in waist type hole (31), expansion gear (4) are including butt block (41) and movable rod (42), butt block (41) size and shape and waist type hole (31) adaptation, butt block (41) are arranged in waist type hole (31), movable rod (42) one end is articulated with butt block (41), and the other end is articulated with screw rod (1), movable rod (42) and the contained angle that screw rod (1) formed when butt block (41) were arranged in waist type hole (31) are less than 90.

2. A reusable expansion screw according to claim 1, characterized in that: one end, close to the nut (2), of the sleeve (3) is provided with a blocking piece (32) along the circumferential direction of the sleeve (3), and the blocking piece (32) is axially vertical to the sleeve (3).

3. A reusable expansion screw according to claim 1, characterized in that: one end, far away from the nut (2), of the screw rod (1) is fixedly provided with a protrusion (11) along the circumferential direction of the screw rod (1), and the diameter of the protrusion (11) is larger than the inner diameter of the sleeve (3).

4. A reusable expansion screw according to claim 3, characterized in that: one end, far away from the sleeve (3), of the protrusion (11) is provided with a tip part (12), and the tip part (12) is fixedly connected with the protrusion (11).

5. A reusable expansion screw according to claim 1, characterized in that: and a pointed cone (411) protruding from the edge part to the middle part is arranged on one surface, back to the movable rod (42), of the abutting block (41).

6. A reusable expansion screw according to claim 1, characterized in that: a first hinge lug (412) is fixedly arranged on one surface, facing the movable rod (42), of the abutting block (41), a first hinge block (421) is fixedly arranged at one end of the movable rod (42), and the first hinge block (421) is hinged to the first hinge lug (412); the fixed second articulated ear (13) that is provided with on screw rod (1), movable rod (42) other end is fixed and is provided with articulated piece of second (422), articulated piece of second (422) and articulated ear of second (13) are articulated.

7. A reusable expansion screw according to claim 1, characterized in that: the aperture of the waist-shaped hole (31) far away from the screw (1) is larger than that of the waist-shaped hole near the screw (1).

8. A reusable expansion screw according to claim 1, characterized in that: the screw rod (1) is sleeved with two nuts (2), a thickening flat gasket (5) is arranged between the two nuts (2), and the thickening flat gasket (5) is sleeved on the screw rod (1) and is in threaded connection with the screw rod (1).