Expansion structure of expansion pin
By utilizing the expansion structure of the expansion pin and the cooperative design of the screw and expansion cylinder shell, the problem of traditional expansion pins being difficult to remove is solved, thereby reducing damage to the wall and improving reusability during removal.
Patent Information
- Application Number
- CN202520395441.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-07
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2035-03-07
AI Technical Summary
Traditional expansion pins are difficult to remove from the hole after expansion, which may require damaging the expansion tube or the hole wall, limiting their reusability.
An expansion structure for an expansion pin was designed, including a nut and a passive component. Through the ingenious cooperation of the screw and the expansion cylinder shell, the expansion and contraction of the expansion plate are realized, ensuring a firm fixation during installation and reducing damage to the wall during removal.
This approach minimizes damage to walls during demolition while allowing for the reuse of expansion pins, thus reducing maintenance costs and material waste.
Smart Images
Figure CN223781824U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to expansion pin technology field, concretely is a kind of expansion structure of expansion pin. BACKGROUND
[0002] Expansion pin is a kind of fastener, usually made of metal, for fixing two or more objects together, it is composed of a central screw and one or more expansion rings, when screw is screwed into pre-drilled hole, expansion ring will expand due to the push of screw, so as to be tightly fixed in hole, ensure the firmness of connection;
[0003] The working principle of traditional expansion pin is that the expansion tube or expansion sleeve is deformed in hole by the tightening of screw, so as to expand and closely fit hole wall, realize fixing effect;
[0004] The design of expansion site of traditional expansion pin is difficult to restore original shape after expansion, which will cause certain difficulty when object needs to be removed later, because expansion pin is difficult to take out from hole, the shortcoming of this design is that, once expansion pin is installed and expanded, it will be tightly locked with hole wall, and it may need to damage expansion tube or cause damage to hole wall when removing, which limits the reusability of expansion pin, therefore, aiming at the above problems, an expansion structure of expansion pin is provided. CONTENT OF UTILITY MODEL
[0005] The utility model is to provide an expansion structure of expansion pin, to solve the problem that, once expansion pin is installed and expanded, it will be tightly locked with hole wall, and it may need to damage expansion tube or cause damage to hole wall when removing, which limits the reusability of expansion pin.
[0006] To achieve the above object, the utility model provides the following technical scheme:
[0007] An expansion structure of expansion pin, including nut and passive component, passive component is attached to the inside of nut by spiral, passive component slides on the inside of expansion component, passive component includes screw, screw rear end is fixedly connected with rectangular block, rectangular block rear end is fixedly connected with conical block, conical block inside is provided with convex slide, expansion component includes expansion cylinder shell, expansion cylinder shell outside is fixedly connected with rectangular slide, expansion cylinder shell inside is provided with rectangular sliding groove, expansion cylinder shell rear end is provided with receiving groove, expansion cylinder shell receiving groove inside is fixedly connected with cylindrical rod, cylindrical rod is rotatably connected on the inside of cylindrical shaft hole, cylindrical shaft hole is provided on the inside of expansion piece front end, expansion piece inside is provided with friction lines, expansion piece one side is fixedly connected with double column rod.
[0008] As the further optimization of the utility model, wherein: the screw cap inside and the screw rod outside spiral fit, the screw rod is at the front end of the expansion cylinder shell, the screw rod protrudes the outside of the expansion cylinder shell.
[0009] As the further optimization of the utility model, wherein: the expansion cylinder shell is hollow cylindrical shape, the rectangular slide piece protrudes the outside of the expansion cylinder shell, the rectangular slide piece is approximately rectangular shape, the rear end of the rectangular slide piece is arc structure.
[0010] As the further optimization of the utility model, wherein: the rectangular slide groove is rectangular body shape, the rectangular slide groove penetrates the inside of the expansion cylinder shell, the screw rod part is in the inside of the rectangular slide groove.
[0011] As the further optimization of the utility model, wherein: the rectangular block is approximately rectangular body shape, the rectangular block is in the rectangular slide groove of the expansion cylinder shell, the inside of the rectangular block and the conical block is provided with convex slide, the convex slide of the rectangular block and the convex slide of the conical block are communicated, the rear end size of the convex slide is slightly smaller than the diameter of the expansion cylinder shell, the convex slide is four pyramid shape.
[0012] As the further optimization of the utility model, wherein: the receiving groove is rectangular body shape, the receiving groove penetrates the outside of the expansion cylinder shell, the cylindrical rod is cylindrical shape, the cylindrical rod is at the front end of the receiving groove, the number of the cylindrical rod is same with the number of the receiving groove.
[0013] As the further optimization of the utility model, wherein: the cylindrical shaft hole is cylindrical shape, the cylindrical shaft hole penetrates the inside of the expansion sheet, the number of the expansion sheet is same with the number of the receiving groove, the expansion sheet is embedded in the inside of the receiving groove, the double cylindrical rod is two cylindrical segments, one end of the double cylindrical rod is in the inside of the convex slide, the number of the double cylindrical rod is four, the rear end of the expansion sheet is at the rear end of the expansion cylinder shell.
[0014] Compared with the prior art, the utility model has the advantages of:
[0015] In the utility model, the passive assembly and the expansion assembly are arranged, so that the device can be firmly fixed during installation and the damage to the wall during removal is reduced, and the device can be repeatedly used, the expansion sheet of the expansion part is retracted into the receiving groove during the removal process, the expansion pin can be pulled out as a whole, the damage to the wall is reduced, the flexibility and economy of the expansion pin are improved, the expansion pin can be easily removed without damaging the fixed base material, and the maintenance cost and material waste are reduced. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 It is the whole structure schematic view of the utility model;
[0017] Figure 2 It is the nut structure schematic view of the utility model;
[0018] Figure 3 It is the expansion cylinder shell structure schematic view of the utility model;
[0019] Figure 4 It is the structure schematic view of the utility model at A place; Figure 3
[0020] Figure 5 It is the rectangular block structure schematic view of the utility model;
[0021] Figure 6 It is the rectangular sliding piece structure schematic view of the utility model;
[0022] Figure 7 It is the expansion piece structure schematic view of the utility model.
[0023] In the drawing: 1, nut;
[0024] 2, passive assembly; 21, screw rod; 22, rectangular block; 23, conical block; 24, convex slide;
[0025] 3, expansion assembly; 31, expansion cylinder shell; 32, rectangular sliding piece; 33, rectangular sliding groove; 34, storage recess; 35, cylindrical rod; 36, expansion piece; 37, cylindrical shaft hole; 38, frictional line; 39, double-column rod. DETAILED DESCRIPTION
[0026] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0027] It should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and furthermore, it should be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, operation, device, component and / or combination thereof.
[0028] Please refer to Figures 1-7 The utility model provides a technical scheme:
[0029] The expansion of the expansion pin structure includes a screw cap 1 and a passive component 2, the inside of the screw cap 1 is helically attached with the passive component 2, the outside of the passive component 2 slides in the inside of the expansion component 3, the passive component 2 includes a screw rod 21, the rear end of the screw rod 21 is fixedly connected with a rectangular block 22, the rear end of the rectangular block 22 is fixedly connected with a tapered block 23, the inside of the tapered block 23 is provided with a convex slide 24, the expansion component 3 includes an expansion cylinder shell 31, the outside of the expansion cylinder shell 31 is fixedly connected with a rectangular sliding piece 32, the inside of the expansion cylinder shell 31 is provided with a rectangular sliding groove 33, the rear end of the expansion cylinder shell 31 is provided with a receiving groove 34, the inside of the receiving groove 34 provided in the expansion cylinder shell 31 is fixedly connected with a cylindrical rod 35, the cylindrical rod 35 is rotatably connected in the inside of a cylindrical shaft hole 37, the cylindrical shaft hole 37 is provided in the inside of the front end of an expansion piece 36, the inside of the expansion piece 36 is provided with a frictional pattern 38, one side of the expansion piece 36 is fixedly connected with a double column rod 39.
[0030] As a further implementation of the scheme, the inside of the screw cap 1 is helically attached with the outside of the screw rod 21, the screw rod 21 is located at the front end of the expansion cylinder shell 31, the screw rod 21 protrudes outside the expansion cylinder shell 31, the helical attachment design allows the screw cap 1 to push the screw rod 21 forward through rotational movement, achieving rapid installation of the expansion pin;
[0031] As a further implementation of the scheme, the shape of the expansion cylinder shell 31 is a hollow cylinder, the rectangular sliding piece 32 protrudes outside the expansion cylinder shell 31, the shape of the rectangular sliding piece 32 is approximately rectangular, the rear end of the rectangular sliding piece 32 is arc-shaped, the hollow cylindrical shape of the expansion cylinder shell 31 helps to reduce weight while maintaining structural strength, and the rectangular body shape and arc-shaped rear end structure of the rectangular sliding piece 32 provide additional support and friction, preventing the expansion cylinder shell 31 from rotating in the wall and ensuring the stability of the expansion pin during installation and removal;
[0032] As a further implementation of the scheme, the rectangular sliding groove 33 is provided in the shape of a rectangular body, the rectangular sliding groove 33 penetrates the inside of the expansion cylinder shell 31, part of the screw rod 21 is located inside the rectangular sliding groove 33, the rectangular body shape and penetration design of the rectangular sliding groove 33 provide stable guidance for the screw rod 21, ensuring that the screw rod 21 can move smoothly along the rectangular sliding groove 33 when the screw cap 1 is rotated, improving the accuracy and efficiency of installation;
[0033] As a further implementation of the present scheme, the rectangular block 22 is approximately rectangular in shape, the rectangular block 22 is inside the rectangular sliding groove 33 opened in the expansion cylinder shell 31, the convex slide 24 is opened in the inner side of the rectangular block 22 and the conical block 23, the convex slide 24 of the rectangular block 22 communicates with the convex slide 24 of the conical block 23, the size of the rear end of the convex slide 24 is slightly smaller than the diameter of the expansion cylinder shell 31, the shape of the convex slide 24 is a quadrangular pyramid, the shape of the receiving groove 34 is a rectangular body, the receiving groove 34 penetrates the outside of the expansion cylinder shell 31, the cylindrical rod 35 is in the front end of the receiving groove 34, the number of cylindrical rods 35 is the same as the number of receiving grooves 34, the communication design of the convex slide 24 in the inner side of the rectangular block 22 and the conical block 23 allows the double column rod 39 to slide therein, realizes the control of the expansion piece 36 of the expansion part, the quadrangular pyramid shape of the convex slide 24 helps to uniformly distribute the force during the expansion process, ensures that the expansion piece 36 can stably expand and shrink, improves the sealing and reusability of the expansion pin;
[0034] As a further implementation of the present scheme, the cylindrical shaft hole 37 is opened in the shape of a cylinder, the cylindrical shaft hole 37 penetrates the inner side of the expansion piece 36, the number of expansion pieces 36 is the same as the number of receiving grooves 34, the expansion piece 36 is embedded and installed inside the receiving groove 34, the double column rod 39 is in the shape of two cylinders, one end of the double column rod 39 is inside the convex slide 24, the number of double column rods 39 is four, the rear end of the expansion piece 36 is at the rear end of the expansion cylinder shell 31, the cylindrical shape and penetration design of the cylindrical shaft hole 37 provide accurate guidance for the expansion piece 36, ensure that the expansion piece 36 can move uniformly during expansion and contraction, the two-cylinder shape and number design of the double column rod 39 makes the expansion pin can uniformly shrink when disassembled, reduces the damage to the wall, at the same time ensures the reusability and reliability of the expansion pin installation.
[0035] Work flow: when the expansion pin is installed in the wall hole of the wall, the whole is inserted into the wall hole, when the front end of the expansion cylinder shell 31 is flush with the wall, the outer part of the rectangular slide 32 is tightly attached to the wall hole, the through hole of the object is sleeved on the outside of the screw rod 21, at this time, the nut 1 is rotated by the wrench, when the nut 1 is rotated, the screw rod 21 moves forward due to the spiral fit between the nut 1 and the screw rod 21, the rectangular block 22 is driven by the screw rod 21 to move forward, the rectangular block 22 slides in the rectangular groove 33 of the expansion cylinder shell 31, when the double column rod 39 gradually slides to the rear end of the convex slide 24 of the tapered block 23, according to the shape of the convex slide 24, under the extrusion of the convex slide 24, the double column rod 39 gradually expands and moves outward, the rear end of the expansion sheet 36 is attached to the outside of the convex slide 24, under the action of the convex slide 24 and the double column rod 39, the expansion sheet 36 expands outward, the front end of the expansion sheet 36 is rotatably connected to the outside of the cylindrical rod 35 through the cylindrical shaft hole 37, the cylindrical rod 35 and the cylindrical shaft hole 37 are arranged to limit the rotation direction of the expansion sheet 36, under the friction force of the rectangular slide 32 and the wall, the expansion cylinder shell 31 can be prevented from rotating, the installation of the expansion pin between the object and the wall is completed, when the object needs to be removed, the nut 1 is removed, the screw rod 21 is pressed backward, the rectangular block 22 and the tapered block 23 are driven by the screw rod 21 to move backward, under the guidance of the convex slide 24 of the tapered block 23 and the rectangular block 22, the four double column rods 39 gradually move inward, the double column rods 39 drive the expansion sheets 36 to shrink, at this time, the expansion sheets 36 are stored in the storage groove 34, the expansion pin can be directly pulled out, the damage to the wall is reduced, and the expansion pin can be reused.
[0036] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.
Claims
1. An expansion structure of an expansion pin comprising a screw cap (1) and a passive component (2), characterized in that: The nut (1) inside screw fit with passive components (2), the passive components (2) outside slide in the inside of expansion components (3), the passive components (2) include screw rod (21), the screw rod (21) rear end fixedly connected with rectangular block (22), the rectangular block (22) rear end fixedly connected with conical block (23), the conical block (23) inside is provided with convex slide (24), the expansion components (3) include expansion cylinder shell (31), the expansion cylinder shell (31) outside fixedly connected with rectangular slide (32), the expansion cylinder shell (31) inside is provided with rectangular slide groove (33), the expansion cylinder shell (31) rear end is provided with the accommodation recess (34), the expansion cylinder shell (31) inside fixedly connected with the columnar rod (35) of the accommodation recess (34) that sets up, the columnar rod (35) rotationally connected in the inside of cylindrical shaft hole (37), the cylindrical shaft hole (37) is provided in the inside of expansion sheet (36) front end, the expansion sheet (36) inside is provided with friction lines (38), expansion sheet (36) one side fixedly connected with double column rod (39).
2. A dilatation structure of an expanding spike according to claim 1, characterized in that: The nut (1) inside screw fit with passive components (2), the passive components (2) outside slide in the inside of expansion components (3), the passive components (2) include screw rod (21), the screw rod (21) rear end fixedly connected with rectangular block (22), the rectangular block (22) rear end fixedly connected with conical block (23), the conical block (23) inside is provided with convex slide (24), the expansion components (3) include expansion cylinder shell (31), the expansion cylinder shell (31) outside fixedly connected with rectangular slide (32), the expansion cylinder shell (31) inside is provided with rectangular slide groove (33), the expansion cylinder shell (31) rear end is provided with the accommodation recess (34), the expansion cylinder shell (31) inside fixedly connected with the columnar rod (35) of the accommodation recess (34) that sets up, the columnar rod (35) rotationally connected in the inside of cylindrical shaft hole (37), the cylindrical shaft hole (37) is provided in the inside of expansion sheet (36) front end, the expansion sheet (36) inside is provided with friction lines (38), expansion sheet (36) one side fixedly connected with double column rod (39).
3. A dilatation structure of an expanding spike according to claim 1, characterized in that: The expansion cylinder shell (31) is hollow cylindrical, the rectangular slide (32) protrudes from the outside of the expansion cylinder shell (31), and the rectangular slide (32) is approximately rectangular in shape.
4. The expanding structure of claim 1, wherein: The rectangular slide groove (33) is rectangular in shape, extends through the inside of the expansion cylinder shell (31), and the screw rod (21) is partially located inside the rectangular slide groove (33).
5. The expanding structure of claim 1, wherein: The rectangular block (22) is approximately rectangular in shape, is located inside the rectangular slide groove (33) of the expansion cylinder shell (31), and the inside of the rectangular block (22) and the conical block (23) is provided with the convex slide (24). The convex slide (24) of the rectangular block (22) is in communication with the convex slide (24) of the conical block (23), the rear end of the convex slide (24) is slightly smaller than the diameter of the expansion cylinder shell (31), and the convex slide (24) is a quadrangular pyramid.
6. The expanding structure of claim 1, wherein: The accommodation recess (34) is rectangular in shape, extends through the outside of the expansion cylinder shell (31), the columnar rod (35) is cylindrical in shape, is located at the front end of the accommodation recess (34), and the number of columnar rods (35) is the same as the number of accommodation recesses (34).
7. The expanding structure of claim 1, wherein: The cylindrical shaft hole (37) is shaped as a cylinder, penetrates the inner side of the expansion sheet (36), the number of the expansion sheet (36) is the same as the number of the receiving groove (34), the expansion sheet (36) is embeddedly installed inside the receiving groove (34), the double column rod (39) is shaped as two cylinders, one end of the double column rod (39) is inside the convex slide (24), the number of the double column rod (39) is four, the rear end of the expansion sheet (36) is at the rear end of the expansion cylinder shell (31).