CN211501242U

CN211501242U - Telescopic claw type recoverable expansion screw

Info

Publication number: CN211501242U
Application number: CN201922503557.8U
Authority: CN
Inventors: 赵立荣
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-28
Filing date: 2019-12-28
Publication date: 2020-09-15
Anticipated expiration: 2029-12-28

Abstract

The utility model discloses a recoverable expansion screw of flexible claw formula relates to an expansion screw field. The utility model provides a present inflation screw can not reuse's problem. The retractable claw type retractable expansion screw is provided with a snap ring, a spring, a clamping head and a supporting sliding plate, wherein the outer end of the conical head is provided with an internal thread corresponding to the external thread at the inner end of the screw rod, two or more retractable holes are formed in the wall of the expansion sleeve, the supporting sliding plate is provided with a supporting rod and a sliding plate, and the diameter of the clamping head is larger than that of a through hole in the snap ring. The utility model has simple structure, easy manufacture, convenient installation and repeated utilization.

Description

Telescopic claw type recoverable expansion screw

Technical Field

The utility model relates to an expansion screw field especially relates to a recoverable expansion screw of flexible claw formula.

Background

At present, expansion screws are generally used for fastening objects in buildings, so that the expansion screws have wide application range. The general expansion screw is composed of an expansion sleeve, a screw rod with a conical head, a screw cap and the like, wherein one end of the expansion sleeve is provided with an expansion groove, one end of the screw rod is provided with the conical head, when the expansion screw is installed, firstly, a hole is drilled in a wall, the screw rod and the expansion sleeve are placed in the hole, then, the screw cap is screwed to pull the screw rod, the conical head of the screw rod extrudes the expansion end of the expansion sleeve to expand, the expansion end is tightly expanded with the wall hole, and an installed object is fixed on the wall. However, the existing expansion screw is influenced by the structure, the expansion sleeve is difficult to take out the screw rod and the expansion sleeve from the wall hole after entering the wall hole and being extruded and expanded by the conical head, so that the expansion screw cannot be reused in reality, not only is waste caused, but also the attractiveness of the wall body is influenced when the expansion screw is left on the wall, and meanwhile, the screw rod is exposed out of the wall surface, so that the potential safety hazard is caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the defects in the prior art and providing a retractable claw type recoverable expansion screw which has simple structure, easy manufacture, convenient installation and repeated utilization.

In order to achieve the purpose, the utility model provides a telescopic claw type recoverable expansion screw, which comprises a screw rod with a conical head, a screw cap and an expansion sleeve, wherein the outer end of the screw rod is provided with a first external thread; the telescopic claw type recyclable expansion screw is provided with a clamping ring, a spring, a clamping head and a supporting sliding plate; the inner end of the screw rod is provided with a second external thread movably connected with the conical head; the outer end of the conical head is provided with an internal thread corresponding to the external thread at the inner end of the screw rod, and the outer edge of the conical head is vertically provided with one or more than two anti-skid protrusions; two or more telescopic holes are arranged on the wall of the expansion sleeve, and the radial radians of the adjacent telescopic holes on the wall of the expansion sleeve are equal; the snap ring is provided with through holes with the same number as the telescopic holes, and the radians of the adjacent through holes are equal; the supporting sliding plate is provided with a supporting rod and a sliding plate which are fixedly connected, and the supporting rod penetrates through a through hole in the clamping ring and is movably connected with the clamping head through threads; the spring is sleeved on the supporting rod between the supporting sliding plate and the clamping ring, the diameter of the clamping head is larger than that of the through hole in the clamping ring, and the length of the clamping head is larger than or equal to the thickness of the expansion sleeve.

The length of the supporting rods is equal to one half of the length of the radius of the expansion sleeve; the angle of the fixed connection between the support rod and the sliding plate is 60 degrees; the outer port of the expansion sleeve is provided with a taking-out hole.

The utility model has the advantages that: the telescopic claw type recoverable expansion screw has simple structure, easy manufacture and convenient installation; the utility model has the advantages that after the elastic sheet arranged in the existing expansion sleeve moves outwards from the wall hole by the conical head to generate pressure, the expansion column extends outwards from the wall of the expansion sleeve, so that the expansion sleeve is firmly fixed in the wall hole, and the fastening function of the expansion screw and the wall hole is realized; when the expansion sleeve needs to be taken out of the wall hole, the conical head is pushed into the wall hole, the elastic sheet is restored under the action of the spring force, the telescopic column returns into the wall of the expansion sleeve, and the expansion sleeve can be taken out of the wall hole by the hook, so that the expansion screw is recycled, and the defect that the expansion screw cannot be taken out of the wall hole after being used in the prior art is overcome; the expansion screw can be recovered, so that the wall surface can be artificially restored to be beautiful; and because the wall surface has no metal projection, the potential safety hazard is fundamentally eliminated.

The retractable claw type retractable expansion screw of the present invention will be further described with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic perspective view of the present invention;

FIG. 2 is an exploded view of the present invention;

fig. 3 is a cross-sectional view of the support slide plate of the present invention on the wall of the expansion sleeve after being pressed by the conical head.

In the figure: 1. the anti-skidding support device comprises a conical head, 2, a screw rod, 3, a screw cap, 4, an expansion sleeve, 5, an external thread I, 6, a clamping ring, 7, a spring, 8, a clamping head, 9, a support sliding plate, 10, an external thread II, 11, an internal thread, 12 anti-skidding protrusions, 13, a telescopic hole, 14, a through hole, 15, a support rod, 16, a sliding plate and 17 and a taking-out hole.

Detailed Description

As shown in fig. 1, 2 and 3, the retractable claw type recoverable expansion screw of the present embodiment includes a screw rod 2 with a conical head 1, a nut 3 and an expansion sleeve 4, wherein an outer end of the screw rod 2 is provided with an external thread 5, the nut 3 is movably connected with an outer end of the screw rod 2 through the external thread 5, and an inner end of the screw rod 2 is connected with the conical head 1. The telescopic claw type recoverable expansion screw is provided with a clamping ring 6, a spring 7, a clamping head 8 and a supporting sliding plate 9. The inner end of the screw rod 2 is provided with a second external thread 10 movably connected with the conical head 1. The outer end of the conical head 1 is provided with an internal thread 11 corresponding to the external thread two 10 at the inner end of the screw rod 2, and the outer edge of the conical head 1 is vertically provided with one or more than two anti-skid protrusions 12. Two or more telescopic holes 13 are arranged on the wall of the expansion casing 4, and the radial radians of the adjacent telescopic holes 13 on the wall of the expansion casing 4 are equal. The snap ring 6 is provided with through holes 14 with the same number as the telescopic holes 13, and the radians between the adjacent through holes 14 are equal. The supporting sliding plate 9 is provided with a supporting rod 15 and a sliding plate 16, the supporting rod 15 and the sliding plate 16 are fixedly connected, and the supporting rod 15 penetrates through a through hole 14 in the clamping ring 6 and is movably connected with the clamping head 8 through threads. The spring 7 is sleeved on the support rod 15 between the support sliding plate 9 and the snap ring 6, the diameter of the chuck 8 is larger than that of the through hole 14 on the snap ring 6, and the length of the chuck 8 is larger than or equal to the thickness of the expansion sleeve 4. Two support sliding plates 9 are arranged, the length of the support rod 15 is equal to one half of the radius length of the expansion sleeve 4, and the angle of the fixed connection between the support rod 15 and the sliding plate 16 is 60 degrees; an outlet hole 17 is provided in the outer end of the expansion sleeve 4.

After inserting the bracing piece 15 into spring 7 earlier, insert perforation 14 on the snap ring 6 and pass through screw thread swing joint with dop 8 with the outer end of bracing piece 15 again, cup joint spring 7 back with the bracing piece 15 on the support slide 9 in proper order and dop 8 swing joint and connect on each flexible hole 13 on snap ring 6, then insert the snap ring 6 of joint support slide 9 in the expansion casing 4, then insert in the flexible hole automatically when the dop 8 meets flexible hole 13 in the expansion casing 4 in-process.

Will the utility model discloses an it is downthehole that the inflation screw inserts the wall, rotatory nut 3 just drives screw rod 2 and stimulates conical head 1 and moves outward to the wall, then gradually extrude slide 16 on the support slide 9 in the expansion sleeve 4 when moving outward to the wall because of conical head 1, slide 16 receives after outside pressure then the bracing piece 15 also outwards stretches out to the wall when spring 7 compressed, even get dop 8 stretch out expansion sleeve 4 and arrive at the wall downthehole wall, the function that the inflation screw had just been realized on the wall downthehole wall because of 8 perpendicular presses of dop after the atress. When needs will the utility model discloses an expansion screw takes out the time, loosening screw rod 2 and conical head 1 behind the derotation nut 3, push into expansion sleeve 4 inner alright make slide 16 not receive behind conical head 1 the pressure with screw rod 2 and conical head 1 again just can the automatic recovery original state under spring 7's effect, it is downthehole that the dop 8 returns expansion sleeve 4 walls flexible this moment promptly, so available metal hook insert take out just very easily in the hole 17 the utility model discloses an expansion screw takes out and reuse.

Claims

1. A telescopic claw type recyclable expansion screw comprises a screw rod with a conical head, a screw cap and an expansion sleeve, wherein an external thread I is arranged at the outer end of the screw rod, the screw cap is movably connected with the outer end of the screw rod through the external thread I, and the inner end of the screw rod is connected with the conical head; the telescopic claw type recyclable expansion screw is characterized in that the telescopic claw type recyclable expansion screw is provided with a clamping ring, a spring, a clamping head and a supporting sliding plate; the inner end of the screw rod is provided with a second external thread movably connected with the conical head; the outer end of the conical head is provided with an internal thread corresponding to the external thread at the inner end of the screw rod, and the outer edge of the conical head is vertically provided with one or more than two anti-skid protrusions; two or more telescopic holes are arranged on the wall of the expansion sleeve, and the radial radians of the adjacent telescopic holes on the wall of the expansion sleeve are equal; the snap ring is provided with through holes with the same number as the telescopic holes, and the radians of the adjacent through holes are equal; the supporting sliding plate is provided with a supporting rod and a sliding plate which are fixedly connected, and the supporting rod penetrates through a through hole in the clamping ring and is movably connected with the clamping head through threads; the spring is sleeved on the supporting rod between the supporting sliding plate and the clamping ring, the diameter of the clamping head is larger than that of the through hole in the clamping ring, and the length of the clamping head is larger than or equal to the thickness of the expansion sleeve.

2. The telescopic claw recoverable expansion screw according to claim 1, wherein the support slide is provided in two, the length of the support bar being equal to half the length of the radius of the expansion sleeve; the angle of the fixed connection between the support rod and the sliding plate is 60 degrees; the outer port of the expansion sleeve is provided with a taking-out hole.